I just spent 20 minutes going round and round at wizards.com and never did find the information I was looking for. I'd like to know where I can go to find exact explanations of what cards and sets are legal in each tournament format.
Did'ja try out the link at the top of the Rules Mill?
The main page for formats is: http://www.wizards.com/dci/main.asp?x=UTR_Intro
It includes links to pdf and word documents for overall DCI floor rules, magic specific floor rules, penalties, and policies. This should help out.