Yeah, check the Adobe site.
Adobe CEO on CS6 plan http://prodesigntools.com/when-adobe-cs6-coming-out-creative-suite-6.html
As John said, the complete details of all new and changed features are here:
I made a detailed set of videos about all of the new and changed features in Adobe Premiere Pro CS5.5, too.
Sometimes these new versions can be confusing. Adobe bought out homesite......... I know, I know......... homesite is sort of old news. But I loved homesite, so, I was forced to buy the new adobe program.