Killzig has apparently gotten hand of an XBox, and brings us this description, presumably taken from the aforementioned marketplace:

"Vault Tec engineers have worked around the clock on an interactive reproduction of Wasteland life for you to enjoy from the comfort of your own vault. Fallout 3 includes an expansive world, unique combat, shockingly realistic visuals, tons of player choice, and an incredible cast of dynamic characters. Every minute is a fight for survival against the terrors of the outside world -- radiation, Super Mutants, and hostile mutated creatures. From Vault-Tec(r), America's First Choice in Post-Nuclear Simulation(tm)."

Those of us who have yet to purchase an XBox - or any other gaming console since the SEGA 8-bit for that matter, thank you very much - will just have to manage without.