No joke. Ghostbusters ain't coming to the PSP, so don't bother calling them over. This is despite ESRB's games listing posted a couple of days ago, claiming that the ghost bustin' team will be seeing the light of PSP day with an Everyone 10 rating.
Atari confirms this news, with a spokesperson saying that, "Currently a PSP version is not a part of the release plan for Ghostbusters: The Video Game." Atari will release the game only for the Xbox 360, PlayStation 3, Wii, and DS, as well as PC.
And that's that. Busted.