Can someone point me to the new/updated features list, in the version of Acrobat that's part of the recently released CS6
There is no new version. CS6 ships with Acrobat X, same as CS5.5 - the update schedules for Creative Suite and Acrobat are totally different.
As Dave Merchant mentioned, CS6 ships with Acrobat X. Acrobat X was released in November 2010. That said, if you're new to Acrobat X, you can find an overview of what's new here: http://help.adobe.com/en_US/acrobat/pro/using/WS4bebcd66a74275c320243650128f5f4e305-8000.h tml