I offered to rip a DVD of a fundraiser for a local non-profit so they could post it on their web site. I figured MPEG4 + MP3 would be a reasonable lowest common denomenator but it appears that it is not--the tested Windows systems didn't know what to do with the resulting .avi. Anyone have any recommendations on a video format that would work well on a range of systems at about 300 kbit/sec @ 320x240 resolution?