This is where you can find links to othr websites that concern themselves with Diablo 3(Links open in new windows).
Unofficial Diablo 3 Database A really good place to get all sorts of info on Diablo 3. Has a bestiary, item lists, and things like that. (http://www.d3db.com)
Gamefaqs Message Board on Diablo 3 A really good place to discuss Diablo 3; you'll need to have a Gamefaqs account though.(http://boards.gamefaqs.com/gfaqs/genmessage.php?board=930659)
Official Blizzard's Diablo 3 homepage The official place, has a good FAQ and cool indo on the characters. (http://www.blizzard.com/diablo3)
Well, those should last you a while. If you have any suggestions for good websites to link to, post them in the forums.