I just got this flash too but haven't found many videos on youtube! Maybe I am just not looking hard enough! off to search now...
Here are some links that might help.
http://www.digital-photography-school.com/slow-sync-flash
http://www.youtube.com/watch?v=Dy2fR4Qr48I
I have also copy pasted info I found on the web into a word document. This should get you started (I can just hear Mom2RTK now saying "when is your Canon version of this coming out!"
)
Nikon SB 700
Pre flash Icon: fires off 2-3 flashes to measure the main subject and to send data to the flash for proper exposure.
TTL: Through The Lens, flash measures the overall image to send info to the flash to give proper exposure to the main subject.
TTL BL = through the lens Balance Light: The flash measures the foreground and the background, it automatically adjust the flash power to balance the foreground to combine with the backgrounds amount of brightness by fill light (Fill light = fills the shadows).
TTL-FP : (through the lens flash power): measures the brightness of Foreground to combine with the background allowing you to use high shutter speeds and /or high (small) apertures.
Auto Aperture Flash : The flash measures light to give flash power to combine with the selected aperture and ISO sensitivity the user set on the camera.
Non TTL Auto Flash : Allows the user to adjust the exposure compensation easily by adjusting the Aperture ALONE.
GN Guide Number: (distance priority flash) allows the user to adjust the shooting distance. The flash automatically adjusts the power once you set the distance information. It will deliver the same exposure at any selected aperture.
M Manual Flash: the flash is now disconnected from the camera allowing the user to manually adjust the entire flash unit (Exposure compensation, Flash power Output, Distance info, Zooming range to match the cameras selected shutter speed, aperture and ISO sensitivity).
RPT RePeaTing Flash, similar to manual flash, the flash fires repeatedly during a single exposure creating a stroboscopic multiple exposure like effect within the single exposure.
Auto FP (Automatic Flash Power)(Nikon D90 (e5 in CSM, not supported for D60) allows you to override the cameras max aperture/shutter speed setting so you can have a large aperture with a shallow depth of field or you can freeze the action with a super fast shutter speed or both. AFP automatically adjusts your flash power requirements for using higher shutter speeds that the X sync limitation of 1/250s and for using Higher (smaller) apertures with out the aperture locking you experience per ISO selected with sync-ing.
Steps: ATTACH FLASH FIRST. In D90 menu, Custom settings menu, Bracketing flash menu, e5 is the Auto FP setting. Once you have auto FP setting selected the SB700 will sense this and display a FP icon on the screen. Now set camera to the shutter speed and aperture you want. You will have to experiment to see what aperture shutter combo works with the flash.
Bounce guide. Ceiling = 45 degree tilt Tends to deliver shadows under eyes and forehead
-9 degree tilt is for Macro (or on a FLASH BRACKET)
Built in Bounce Card (USE WITH 90 TILT!!) is designed to make subjects eyes vibrant with out shallow eye shadows that are caused by bouncing with out the card.
Built in WIDE FLASH ADAPTER for use with WIDE ANGLE LENSES that have a WIDER ZOOMING RANGE WITHOUT THE BUILT IN WIDE FLASH ADAPTER A N D for MACRO shots that are within 2 feet tilt down the flash head to 9 degrees and pull out the built in wide flash adapter to widen the flash but Macro flash would probably be better.
Diffuse dome (BOUNCE THE FLASH! 45 or 90 degrees) : softens light from flash WHEN DOING BOUNCE FLASH. It creates extremely soft lighting and zero shadows. It can also deliver a much wider flash angle
Flash Gel Filters = white balance adjusters. Orange = Tungsten/ Incandescent light, GREEN is for FLOURESCENT light. Red, yellow, blue = creative
multi-step auto zoom, which automatically detects the lens focal length and adjusts the flash output accordingly for angles of view from 24mm to 120mm.
Three illumination patterns can quickly be selected to match each shooting situation, making it the ideal flash for a range of scenarios. The Centre-weighted pattern offers more power and higher guide number which highlights the subject from its surroundings. The Even setting works well for indoor group shots or a flat surface whilst the Standard setting has a slight emphasis on the centre.
three illumination patterns (standard, center-weighted and even) can be selected in SB-700 to match each shooting situation. When even is selected, the light from the flash will cover a subject from center to edges without light falloff. This pattern is suitable for shooting group photographs indoors. The standard pattern will cover all conventional, standard flash coverage. The center-weighted pattern provides larger guide numbers than other light distribution types at the same focal lengths. This illumination pattern is suitable for subjects such as portraits, in which the light falloff at the image edges can be ignored.
Nikon SB 700 flash
FOR NIKON D90
TO ADJUST MODES listed BELOW ON FLASH YOU MUST DO IT FROM THE CAMERA. Hit INFO, press and hold Flash Comp button on front left hand side of Camera body, Turn rear wheel to adjust to below settings
1. Front Curtain sync light streaks in front of moving subject
In this mode, the flash fires as soon as the front curtain opens completely. The shutter then remains open for the duration of exposure, until the rear curtain closes. If you are shooting moving subject, it will produce stream of motion blur lights effects also called ghost effect in front of the subject.
2. Rear Curtain sync light streaks behind moving subject
With this mode, the front curtain opens completely and remains open for the duration of the exposure. After then, the flash is fired and the rear curtain closes. If the subject is moving, you will get ghost effect behind the subject. When youre using rear curtain / second curtain flash sync, then there might be an appreciable interval between the preflash and the main burst. The slower your shutter speed, the greater this delay between the preflash firing and the main burst. When youre photographing people, then at slower shutter speeds, they DO react to the preflash, and most people will blink in response.
3. Red-eye reduction
In this mode, there is one second lag after pressing the shutter release button before the picture is actually taken, during which the D90′s red-eye reduction lamp lights, causing the subjects pupil to contract, and thus reducing potential red-eye effects.
4. Slow sync Background = blurry lights, subject in front clear and white lit. Flash fires first
Slow sync mode allows D90 to use shutter speed as slow as 30 seconds with the flash to help balance a background illuminated with ambient light with your main subject, which will be lit by the electronic flash. Its better to use tripod to avoid camera shake if you are using slow sync mode. The flash is disconnected from the camera and allows it to Meter for proper exposure. It combines the foreground and the background readings. The flash fires at the beginning of the exposure.
5. Red-eye reduction with slow sync
This mode combines slow sync with D90′s red-eye reduction behavior when using Program or Aperture priority mode.
Slow Sync + Rear Curtain The flash fires twice, at the beginning and then again at the end of the exposure.
Which sync mode can be used with which exposure mode?
In Program and Aperture Priority modes, you can use all five sync modes.
In Shutter Priority and Manual Exposure modes, you can use Front Curtain sync, Rear Curtain sync and Red-eye reduction modes
whereas in Auto, portrait, closeup and scene modes, you can only use Auto (same as Front Curtain sync) and Red-eye reduction mode.
In Night Portrait mode, you can only use Slow sync and Red-eye reduction with Slow sync mode.
I have the icons for the controls/settings in my word document but the wouldn't display in this post.
I hope that helps, you really have to put the time in and work your camera. This took me 3 days of reading/ playing with the camera to figure out. Now I'm going to be the world's SLOWEST photographer at WDW as I try to set my camera up for these flash modes!
Good luck,
Marlton Mom
~ All hail the great youtube!~ 
