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.
Here are the improvements we've made. They're all captured on this one screen shot...
Example Source: ScriptDebugExample.zip
We Need Your Help: Please get the CTP and give it a try! Now is the time to file bugs and give us your feedback. We still have a few weeks to get last minute changes and bugs fixes in. Your bugs are of the highest priority to us! Thanks