Star Trek DAC showed up on XBLA around the time the movie premiered in May. An enhanced version was recently released for PC and PS3 too, just in time to coincide with the movie's DVD release next week. The new version includes updates to the assault and conquest modes, plus the new survival mode, and these features will be available as a free download for the original 360 version. The game looks like a fun little control point scramble, but I doubt I'll be buying it--after multiple viewings I still think the film was pretty pointless, so personally I'm more interested in next year's
Star Trek Online.