This is quite the service pack....

  • Database Mirroring is now supported in production, the extra feedback we got from our Technology Adoption Program Partners has allowed us to provide an even better solution.
  • SQL Server Management Studio - Express Edition, if ever there was a tool that needed a cool (short) codename...
  • Express Advanced (inc Reporting and Full Text)
  • More SAP Connectivity
  • Lots of other fixes, changes.

Its going to be live in a few hours, I'll post the link once I get it.

Enjoy.

Update: Dan has a plethora of good links on SP1 here.