Windows Home Server Power Back 1 Released
 

As many know, Power Pack 1 provides a range of new enhancements, including support for home computers running Windows Vista x64 editions, backup of home server Shared Folders, improvements to remote access, more efficient power consumption and better performance. And, of course, it delivers a fix for the data corruption bug.

Windows Home Server can now be purchased in 50 countries worldwide and a growing ecosystem of third-party software developers has released approximately 60 Add-in programs extending Windows Home Server’s capabilities. To help fuel this development we have updated the Windows Home Server software development kit for Power Pack 1, including new support for the client PC side, i.e. notifications to/from home computers.

http://blogs.technet.com/homeserver/...nd-get-it.aspx

Installed but can't say I've noticed any difference so far.
Which may actually be a good thing :D