I've had 3 Canon digital cameras and have loved each one of them. I bought my first one about 4-5 years ago and loved it until I saw the Canon ELPH cameras. If you haven't checked the Canon ELPH's out I would. They are a little bit bigger than a deck of cards and are very durable. The only reason I don't have this camera anymore is that it was stolen out of our car the morning after our wedding and the morning we left for our honeymoon to WDW. Because I didn't have a camera I borrowed my sister's Sony Digital Camera DSC-T10 to take to Florida. I carried it my purse with nothing other than Kleenex and when I took it out to take a picture the LCD screen was busted. After my experience with the Sony I would never buy a Sony Camera (although that's the only electronics I have at home). The camera was hard to navigate, well not hard, just more complex than the Canon. Just recently I decided to upgrade from an ELPH to a Canon S2 IS (a cross between a digital SLR and a point and shoot). I've used this camera a couple of times and have loved it!
I have some family members that have other brands - Fuji and Kodak. I've looked at the Kodak camera and messed around with it and I really didn't like it, plus one of the downsides (according to my aunt) is that you have to take the docking station to charge the camera. I can't imagine you'd want to take that with you on a trip.
As for the place to buy the camera - I've found some really good deals at
http://www.berger-bros.com. I got my last camera for $279.00 there, while everyone else is selling it for $315+.
As for features - the only ones you should really pay attention to are -
Megapixels or MP- which refers to the resolution of your picture (nothing less than 3.0) so if there is 3 MP - there are 3 million pixels in a square inch.
Optical Zoom - which refers to the zoom being done by the optical lens rather than the computer in the camera (digital zoom). Don't be fooled by a big digital zoom, because the bigger the more distorted your pictures will look. Get a camera with at least a 3x optical zoom.
Lag Time or Shutter Time - which refers to how long it takes the camera to write to the memory card and be ready to take the next picture. The shorter the time, the better the camera. To be quite honest most cameras this day are fast enough that you don't need to worry about this a whole lot - that is unless you are a professional photographer
Good Luck