It really depends what you're going to use it for. I mean, if you're going to be printing these off, you'll need a digital camera with at least 4.0 megapixels, however, if you won't be printing them off, fewer megapixels will suffice.
Since I don't know what you want to do with your camera, here's a good website to check out.
http://reviews.cnet.com/Digital_came...g=cnetfd.glnav
Check this out too
http://reviews.cnet.com/Digital_came...ml?tag=dir.dpg