I've mentioned this before, but I didn't receive the greatest enthusiasm to it. A great compression tool I got (recomended by the folks at posemation) is called Bink. You can get it at www.radgametools.com - I have compressed video without sound at a 115:1 ratio on an AVI. I haven't tested it with sound yet, but it can use MP3's as sound sources. You need to have bink to view a bink file, but you can also save it as a self playing exe file that doesn't require the program.