Just how important is SharePoint to Microsoft?

In this morning's keynote session Steven Sinofsky told how BillG has personally taken the role of Lead PM on the Windows SharePoint Services v3 User Experience team.  If you are in any doubt about how strategically important this product is to Microsoft, that should give you some clue.  And if you don't like what you see when you get to PDC, you'll know who to blame ;)