Update Rollup 2 for Windows XP Media Center Edition 2005 was released today!  Get it while it's hot.  In addition, for all you developers out there, a new SDK was released and can be downloaded from http://www.microsoft.com/downloads/details.aspx?FamilyId=1D836C29-ABD5-4FDD-90C5-5C5ABAE97DB4&displaylang=en.