Great answers from: Matt Kloskowski
http://lightroomkillertips.com/2010/qa-lightroom-3/
Check out Matt’s site for allot more information and training videos.
Also see:
http://cameradojo.com/2010/06/11/lightroom-3s-lesser-known-new-features/
** I just downloaded the demo and will be seeing if I think its worth it to me to upgrade and also how it might assist my workflow related to glamour work **