Since I moved over to the Office team this blog (primarily focused on XPS) is not very active.  If you are looking for the latest info on XPS, here are some helpful links: 

XPS implementation information at http://www.microsoft.com/xps

 

XPS in Vista at http://www.microsoft.com/windows/products/windowsvista/features/details/xps.mspx

 

XPS forum on MSDN at http://forums.microsoft.com/msdn/showforum.aspx?forumid=126&siteid=1

 

The XPS team blog at http://blogs.msdn.com/xps

 

Adrian Fords blog at http://blogs.msdn.com/adrianford

- Andy