Power Pack 1 fixes the data corruption bug as well as delivers significant new functionality including:

• 1x64 support for home computers running Windows Vista
• Home Server Shared Folder backup
• Improved remote access experience
• Improvements to power consumption and performance
• Localization support for Japan and China

HP has also started pushing an update to their Windows Home Server powered HP Media Smart products timed to coincide with Power Pack 1.

• Update Package
• Release Notes
• Team Blog

Congrats to the Windows Home Server team.  I really like WHS and would run it instead of Vista Premium + Drobo as my primary home media hub if they'd support Windows Media Center & OCUR recording as a service.  Then I'd truly have a headless home media server that does it all (as I sit here dealing with my wife's system requiring a backup...)  How would you improve Windows Home Server after this release?