In conjunction with the Worldwide Partner Conference (WPC), Microsoft has started showing off a bit more of the next versions of Office and SharePoint. Still no bits for most of us* to play with, but there are some preview videos talking about the changes. Click the link below to check out the Sneak Peek site, and stay tuned!
http://sharepoint.microsoft.com/2010/Sneak_Peek/Pages/default.aspx
* Note: There is an invitation-only preview program. Tech-Ed 2009 attendees got invitations for the Office client pieces. I'm not sure at this time about SharePoint Server.