I mentioned some of the aspects of the Visual Studio March CTP in a recent post and here's another one to read about.  Noah describes script debugging improvements in Orcas:

We've made some significant improvements to script debugging!  The VS script debugger hasn't seen real improvements since VS6 (pre-.NET).  Now with ASP.NET AJAX (MS' new AJAX framework), script debugging has caught a new wind.  You can try these out in the new VS Orcas March CTP.

As always, let us know what you think.