Hold on to your hats everyone, it's happening again...
A new, remotely executable, exploit for XP and Vista has been demonstrated and depending on upon how a worm will use it (a worm is sure to be developed for this), this could make Slammer and Sapphire look like cake-walks. I hope I'm wrong (but I'm probably not).
As it happens I had made my decision to not adopt Vista before I found the following report, but it underscores a number of my concerns about the platform.
Peter Gutmann (of Auckland university) has produced A Cost Analysis of Windows Vista Content Protection.