LongHorn seemed to work ok for a beta, but it certainly had a number of issues. The most annoying being that when it went into power saving mode, my USB Mouse would not function until I unplugged and replugged. Then as I mentioned my Audio drivers would not work. Lastly, the reason I uninstalled is that I wanted to reencode some movies with Nero Recode and it would crash.
On a side note, the new event log is pretty kick ass. It is multipaned and allows you to see more details about the error without popping up a modal dialog. Events also appear to be stored in XML now.
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