I can't believe I haven't seen this blog article before now...I just learned about it from the Profiling team today.  Ian's done a great job of describing some new features in the Profiler that are now available with Visual Studio Team System "Orcas" beta 1.  In it he writes:

With the recent release of the first Beta for Visual Studio Team System (codename Orcas) customers will get their first chance to see all the great new features that we are adding to the product. For the profiler in particular we’ve added some very cool new features that I’m really happy to finally be able to reveal publicly.

I've had the pleasure to see these new features demoed to me...I'd highly recommend taking a look at these when you have a chance and let us know what you think.