Will Visual Studio 2008 be supported by new .NET 4 from the get go?
I\'m particularly interested in the System.Collections.Concurrent namespace and the parallel task
If you want to know whether upgrading to VS 2010 will be worth it, then download beta 2 now, and try it out. Run it in a virtual machine if you don't trust it on a normal development machine. Run through some of the PDC videos showing the new features. Go through the Training Courses.
And above all, tell Microsoft what you think.