A Bethesda representative has confirmed to
GameSpy that, "the next DLC for Fallout 3, The Pitt, will be out in March. Broken Steel will be out the following month, in April." That's equals a saddening one month delay for each expansion.
The Pitt will take gamers to the industrial raider town of the same name, located in the remains of Pittsburgh, while Broken Steel will let players loin the ranks of the Brotherhood of Steel and rid the Capital Wasteland of the Enclave remnants once and for all.
"The next DLC for Fallout 3, The Pitt, will be out in March," Bethesda vice president of marketing Pete Hines said. "Broken Steel will be out the following month, in April."
[SOURCE]