SP2 shipped today. Whilst a key update to our current server platform, the SP is pretty unobtrusive - W2003 SP1 and XP SP2 were major changes in terms of security modifications (and resultant potential impact on applications) however SP2 is definitely evolutionary rather than evolutionary. As a result, there isn't that much to blog about apart from helping publicise its availability and to encourage you to try it out - see the links below.
Main link: http://www.microsoft.com/technet/windowsserver/sp2.mspx.
Service Pack 2 Blog: http://blogs.technet.com/windowsserver/