http://www.joystiq.com/2010/01/12/risk-factions-re-inventing-risk-on-xbla-in-early-2010/ I dont know about how this new ruleset will go down, but the devs did say there will be the option for classic games as well - so I won't complain about it. Risk, to me is still the best board game ever invented. Monopoly cant hold a candle to it, despite its legendary popularity.
sounds interesting, but I've stopped getting excited about Arcade games. The last few I've really wanted haven't lived up to expectations for me.