Fizzer, would you have in mind implementing the 2210 AD version? With the introduction of the commander I remembered that Risk 2210 AD is a lot of fun and adds a lot more strategies to the game. There is nowhere to play it online right now.
There is this version but it requires a download and the UI is clunky - it's not really polished.
http://jonathancrosmer.com/software/invadeearth/
