First, if you're talking about pictures just for Web use, you can get away with a cheaper camera, maybe 1-3 megapixels. If you're talking about prints, you'll probably need 2-4 megapixels, depending on print size, etc.
Ron is right about macrofocussing, although I think you should look for a camera that will focus down to a couple of inches or even less.
It took me around a half year to find a camera I like at a price I thought wasn't outrageous--a Sony. Make a list of the specs most important to you, then search for cameras that meet them at review sites like these:
http://orcaonline.org/images/pixel.gif?links.asp
Narrow the list as best you can and, if you expect to buy online, be sure to try some in camera stores before you order anything. Specs are one thing; actual use is another.