Just a couple days ago we released the March CTP of Visual Studio Orcas.  This represents a large percentage of the new features in Orcas and as such I'd recommend checking it out.  We've released a VPC image of the bits (both for Visual Studio and Team Foundation) so that you can avoid the issues around installation of pre-beta software.

Here are the links to download the bits:

If you want to learn more about the new features, I'd suggest reading these two blog entries:

What do you think?  Please let us know!