A posting on GameStop's website showed that it was planning on offering AT&T mobile data plans under a service that was allegedly called GameStop Mobile. Since it was put up, the folks over at Engadget (via Joystiq) were quick enough to have reported on it but after its brief appearance, the posting was taken down. Although the service was just glimpsed for a short time, nothing official has been announced so until then, we will continue to take this piece of news as a rumor and we will treat is as such.
Ubergizmo, GameStop Offers and Then Removes AT&T Mobile Data Plan