This is first in the series of small posts about new features in Orcas…
1. Orcas can be installed and will run side-by-side with Visual Studio 2005 (even with the beta 1 release currently available)
2. You can use Orcas to create projects (i.e. target) using different versions of .NET framework starting with 2.0.
3. You don’t have to upgrade your code to move your source to Orcas.
4. Unit testing is now available in all editions of VS Professional (not just VSTS)
Source: talk by James Conard