> And open-source or not, AVI is still the de facto standard for video interchange when > doing video editing and such.
Not anymore. MKV is a standard format for doing video editing for a long time now. AVI is a compressed format which is geting abandoned very quickly these days while MKV grows stronger. You can see it happening when you go grab high-definition movies around the internet (blu rays mostly), with mp4 in a close second place. AVI is dying pretty fast.