Originally Posted by librarian
I have a
Che-ez Foz II that I got from geeks.com when I was looking for a small camera for my kayak. It is about the size of a credit card and you can get a waterproof case for it. Camera and case are about $80. 2 mega pixels. Also there are lots of 640x480 cameras for about $15.

Well, I purchased one of these cameras. I really like the form factor and it's simple to use and straight forward. I picked it and the case up for under $50 from the Sharper Image store on ebay.
I'm a little disappointed with the image quality and the fact that it's really slow to download images. However, for the price, these limitations are certainly acceptable.
Thanks all for the advice!