It's been about two years since HBO optioned Neil Gaiman's novel American Gods for a TV adaptation. Gaiman recently provided an update on the status of the project.
Gaiman recently turned in the third draft of the pilot script and said it had been very well-received, with an expectation that the project will move ahead at some point. Gaiman said that for the TV show he has radically expanded on the original novel, with new scenes showing the bank robbery that went wrong and landed Shadow in prison. Apparently HBO were concerned about these deviations from the book, so the new scenes have been moved from the start of the episode to later on and reframed as flashbacks.
When we might get a firm commitment from HBO is unknown. HBO's hour-long drama roster is pretty full at the moment, which some have suggested is the reason why both American Gods and their I, Claudius adaptation (which, it is speculated, will be both an adaptation of the Graves novels and also a long-term sequel to HBO's Rome, possibly using that series' still-standing sets in Italy) have not yet moved forwards.