I haven't seen anyone mention that the recently released Flip4Mac WMV 2.1 playback will handle 1080 content on a mini core duo without problems. For me, the beta had severe framerate limitations, and activity monitor showed clear evidence that it was single threaded. The released package is using just over 50% of the CPU complex, so it has a lot of headroom. I tested with content from wmvhd.com, but I was not able to find out which clips had the highest bit rates. The beta did not do well on 720 content either. Now I can shelve that Boot Camp project!