ARMA II only just came out! And as you'd expect from such an ambitious game, is still pretty broken! Neither of which seems to matter, since an expansion for the game has already been announced.
Called Operation Arrowhead, it's set three years after the events depicted in ARMA II and takes place in an all-new region, the tastefully-named Takistan. Yup, an all-new region. Not new missions on an existing map, a whole new place to run around for ages in then die suddenly without warning.
That's about it for the info, because the game won't be properly unveiled until next week at Gamescom in Koln.