Hot off the press (well, from March 2005, anyway), this 88-page whitepaper is a soup-to-nuts path through the product. Get it today at:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/bts_2004wp/html/ffda72df-5aec-4a1b-b97a-ac98635e81dc.asp.