This appears to be the RTM of the extensions for Visual Studio 2005 that improve support for developing Web Parts, site and list definitions. It also includes the "SharePoint Solution Generator". 

Plasma - a web server emulator for unit testing ASP.NET applications 

Scrum for Team System v1.2 has been released.

I don't know a lot about Scrum, other than it seems to sit on the Agile side of things, and describes itself as a "project management process" rather than a methodology.

I might install this on our TFS box and create a Scrum project to see how it looks.

 I didn't know this was coming!

Service Pack 2 for Windows Server 2003. The update applies to the original release and R2.

There's also an ISO version and updated support tools (though the tools still aren't support on Vista).

This was a perfectly timed release - just before I reloaded my machine, the RTM of the Vista compatibility update for Visual Studio 2005. Install service pack 1, and then install this update.