The Gaming Group
New rules, changes from 3.5, and house rules:
Free basic rules
This doesn’t have nearly all the race, class, or character options, but it’s a good place to start, and a good place to learn the rules of combat and other abilities.
Wizard’s Organized Play information
The campaign I’ll be running is the one currently being used for the D&D Encounters games. A lot of the info in this page is specific to that, but some of it might be useful to you, as well.