The profiling will only get better. Right now it profiles everything, but it could potentially be scoped down to "just my code." Plus, it's a sampling profiler as it is so you will need to push some real traffic to work hot spots (as opposed to just browse and click around) in order to get results.

What's cool about it, IMHO (I wrote the post above) is that it takes the V8 profiling stuff and feeds it into the VS visualizer...as it should.