Robbie Bach, the President of  Microsoft's Entertainment and Devices group (yes, that includes the XBox 360 and Zune!) is currently keynoting at MIX.  Check it out at http://www.visitmix.com/Blogs/News/robbie-bach-mix07-keynote-begins-at-430-pm-pst/

Should be a great talk - I'm looking forward to it!

Paul