I'm trying to watch some Google Techtalks in mp4 from Google Video (downloads for Video IPod/Sony PSP) on N800 with OS2008 Beta with default Media Player. It kinda works, but audio/video comes out of sync and video becomes choppy after a short time, and some of these videos fail to start playing from the beginning - you need to move time slider to skip first few minutes. Overall, pretty disappointing. Maybe OS2008 and/or MPlayer will do a better job.