In Bungies latest weekly update Bungie offered their congrats to fellow Game Epic a well as Rare!
"Congrats to Cliffy B and OF COURSE the rest of the team at Epic for the launch of Gears of War. The game is full of amazing art, music, audio and gameplay. A bunch of us have been getting together at night for some curb-stomping, chainsaw-wielding action. It's a violent, gory blast and is apparently the only thing folks on my Friends List are playing. And congrats to rare for busting out Viva Pinata. I won't be playing it myself, because it's for kids, so if you see someone with my Gamertag playing hours of Viva Piñata, then that's erm, my nephew Arvin".