Environmental Building News (EBN) published a guide to the proposed changes to LEED NC issued for public comment and expected to be released in 2012. The EBN article nicely lays out what is mostly the same, what is different, and what is totally new. Since public comment on this draft is open, now is the time to offer comments.
http://www.buildinggreen.com/auth/article.cfm/2010/11/8/Your-Guide-to-the-New-Draft-of-LEED-2012-public-comment-USGBC/
David Stutzman