I've been using a Canon G-3 for about 4 years now and it's been great. But for the $600 I spent 4 years ago you can get a lot more camera now.
Acually for what you want to do any decent 5mg camera with optical zoom & macro will work. Remember the web only sees 72dpi.
The three most important things I've found for taking good pics are
1- A tripod
2- Lighting other than the flash
3- Shooting through the computer. I hook my camera up to my computer and shoot from the desktop. I can see my photos right away and reshoot if need be. They look a lot different than on the little screen. Canon's software is called Remote Capture and it's the only way to go.
4- Digital imaging software. Most cameras come with a lite version but I bought a version of Photoshop. Makes a world of difference. Pro's have to have the latest version but for your needs buy an older version on eBay.
Rob