Google opened up google wave to everyone today. It is kind of a mix between email, IM and a programable white board. I think it would make a great platform to play and test MtG. You can play out your matches, they will all be saved step by step you can then watch them from the beginning as it happend and share them with others. Comments can be made on every entry so it could also be used as a nice teaching and demonstration tool for articles.
Right now it would be typing back and for but from what I understand you could make custom tools to make your waves MtG specific.
Anyway I started a thread to look for other vintage players to play test at
https://wave.google.com/wave/waveref/googlewave.com/w+F5LMiEWiA None the less you can check it out and see what you think and discover.
