3rd Edition Links Worth Giving A look:
3rd Edition.org: This site has some very nice stuff.  Some awesome character sheets as well.
Bradley's 3E Page: This site is great.  He is one of the best on the net
Community 3e: A very nice site with a lot of great 3E stuff.  Highly recommended.
Cyberzombie's House of Rules: Lots of new and upcoming stuff about Greyhawk.  Check it out.
Dr. Skulls D&D Page: Nice site with all new content.
Eric Noah's 3rd Edition News: This is one of the best places on the net for the latest news about 3rd Edition Dnd.
Jamis Bucks RPG Generators: This place has some of the best generators on the net. Highly Recommended!
The Third Tome: A nice site with some very good stuff.