Macworld\’s faq on Office 2011\’s Outlook….
The quick summary is:

• Better PC <-> Macintosh cross platform support (eg. PST file support)
• MobileMe support only includes Contacts support, no calendar, tasks.  This includes no support for iCal.
• No Gmail Calendar support (but includes Gmail Accounts & contacts)

There\’s more, but overall there are features incomplete & missing.  Typical for a Microsoft v1 release…