An unnamed source has told Videogaming 24/7 that the exclusive Grand Theft Auto IV expansion pack for the Xbox 360 will be coming in January or February of 2009:

"It'll be in January or February,"

The information contradicts a statement by Microsoft recently that it would in fact be available for download this fall from the Xbox 360 store. Microsoft did not comment on the news when GamePro contacted them last Thursday.

Thanks Videogaming 24/7, via GamePro