Whoops - I knew that DisneySuiteFreak (DSF?) was in manual exposure mode, but didn't notice that he was
also in manual focus. I didn't catch that you said "lens" - yes, you're right, I should read more thoroughly next time. Oops!
I suspect I'm not the only one in this boat though! DSF, manual exposure (on the mode dial, by P, Av, Tv, etc) is unrelated to the manual focus settings on the body and lens. (And I'm still not sure why they're on both - over here in Pentaxland, you set the focus mode on the body only, not the lens. I can only assume it's to allow the focusing ring to turn, though I'm not sure why they couldn't just do that electronically or some other way, since obviously it
can be done.) If you're setting
everything to manual, you're really roughing it.

And as for metering in M mode - well, it still does meter (that's how it can give you the lines that tell you how close you are to proper exposure, or numeric readout if your camera displays it that way), but it doesn't change anything. Unless you press the AE-L or green button or whatever the D80 uses for that function. (Apparently it's an AE-L/AF-L button - if it works like it does over here, it will set your aperture and shutter speed to recommended values in M mode, you can then adjust them as you like.)
As for bulb mode - again, this is an area where things are slightly different in Pentaxland. Here, Bulb is actually a separate setting on the mode dial - P, Av, Tv, M, and B. I
think that in Nikonland, you select Manual then choose Bulb as your shutter speed? I'm not 100% sure. But anyway, yeah, technically I don't use M mode for my bulb-exposure fireworks photos, but someone with a Nikon or Canon taking the same photos might. Confused yet?
I think I'm having a slightly easier time of undersanding it by reading the D80 Field Guide. The manual is a hodge podge of info and it skips back and forth.

(But from my research, I knew that, and that's why I bought the D80 Field Guide!)
So far, the D80 manual has told me that the lens, body and Mode selector should be set to M when you are in M mode, but the Field Guide said you can set the lens and body to AF and have the mode selector in M. I tried it; it works. I never would have known it was an option though if you didn't say something Groucho.

The manual is more confusing than helpful.

I just discovered that you can use the Bulb feature in M mode and leave everything else at AF. (I havent felt
this dumb in years!!!)

Good thing I still have my sense of humor!

I can still use the focus rings even though the lens and body are set to AF. (Thank God!)
You're correct, it does still meter in M mode, it just doesn't correct it, that's where the adjustment thing comes in w/the lines. (That really sounds amateurish, but my brain is in overload trying to absorb everything all at once.)
There is an AE-L/AF-L button on the back of the camera. Still not sure what it's suposed to be used for.

I believe I read that it has something to do with locking in the focus. There is also a focus selector lock switch, so???

I guess I would use then in tandem?

I figure that if I pressed the AE/AF-L, it would lock the focus -- at least that's what I read in the manual. The switch is a whole other story. (Haven't gotten that far yet!) The D80 Field guide info on the AE/AF-L was pretty limited. Here's what the FG says:
AE/AF Lock - A control on the D80 that lets you lock the current autoexposure (AE) and/or autofocus (AF) settings prior to taking a picture, freeing you from having to hold the shutter release partially depressed, although you must depress and hold the shutter release partially to apply the feature. 
HUH???

What's the point of 'freeing you from having to hold' it, if you have to
press it and hold it to make it work in the first place? Am I not reading English??? Is it just me who finds that verbiage slightly confusing? That's all it says regarding AE/AF-L in the D80 FG.

And the FG is a VAST improvement over the manual.
IMO, these kinds of things are why people buy a DSLR and then continue to shoot everything in Auto. The manual is written from the standpoint that you may, or should, already know a bit about how the camera is set up, what it's for and why.
Right now all I can think is: to make it easier on myself and in the interest of time, and to protect my self esteem -- I should've bought the how to DVD!!!
I still love the camera; I just hate feeling so dumb!
BTW, I'm a she, not a he...
I welcome any info from all you D80 experts out there if it'll help free me from reading the confusing and imho poorly written manual! Share your wealth of information; I'll take it however I can get it!
DSF