Longhorn Hang Reporting
When windows crash under WinHEC Longhorn -- and believe me, they will -- you may try to end the task under task manager to get control of your machine again. A new window pops up, similar to the Error Reporting from XP, this one's called "Windows Hang Reporting", aka dwhang.exe.
Any information I can give to prevent my windows from choking in the future is well worth the effort -- be sure to submit issues as you come across them!