I noticed that you mentioned that every game of Risk is tracked so you can have the ability to catch cheaters. I think that's awesome, but it would be great if users could save and upload their replays to the forums. People could vote on the best replays and players could become more well-known. It would be a great way to further increase the hype and enthusiasm from current and potential new players.
Also, implementing a chat log would be awesome so players could communicate with each other during matches.