I love Risk, but unfortunately I haven't got many opportunities to play it these days. I do play on
ConquerClub though, which is an online Risk site (basically, though for legal reasons they can't actually use those words. They even had to remove the Classic map graphics). Anyone can sign up and play games, though unless you buy Premium you can only play in 4 games, and you can't make private games (you could have someone with Premium make the private game, give you the password, have at least one of you join it, and then he could leave it.. I think
)
My account is niMic there too.