Can hardly wait to dig in...
I can hardly wait to dig into these things which I have long anticipated and greatly need... bravo
WIT Custom Control support - This is a cool new feature. It is a mechanism by which people can design work item forms that host custom controls. The data behind the controls can either be persisted in WIT fields or elsewhere. I'm hoping people go crazy with it and build some awesome custom controls.
Support for Office 2007 (Project and Excel - no Sharepoint 2007 support yet) and the new WAP project support - These were all things that were pretty far from shipping when we shipped so it was not possible to work out all the kinks (bugs on both sides). Now that they are much closer and more stable we've been able to make them work well. Please don't try to install TFS with Sharepoint 2007 at this point - we know it will not work. We are working on Sharepoint 2007 support for Orcas - it will not be in SP1.
Detailed Merge History - We realized after we shipped V1 that we had not exposed all of the information from the server necessary to build all of the sophisticated change tracking tools we use internally that track the flow of changes through branches. The server "summarized" merge history information too much and we could only approximate the information. SP1 includes a new web service method and object model API that allows access to the detailed information. The new API is called QueryMergesWithDetails on the SourceControl object. -- From Brian Harry's blog
And a wise choice in regards to Vista in my opinion as indicated by Soma's blog entry which states
... However, we will not support Visual Studio .NET 2002 or Visual Studio .NET 2003 as development environments on Windows Vista....