ggFTW itself reaches ~ 360,000 people per month. The network (adjusted for overlap) reaches 480k and it's growing rapidly.
@WingedSylphe or anyone else who works with/for game publishers -- if you think there may be a good match please ask them to reach out to advertising [at] ggftw [dot] com.
@Wendyfav3, no, the network is really not suited to advertising things other than games or game-related services (hardware, etc). I appreciate the thought but we have to focus our efforts on products most relevant to our entire audience as advertising inventory is a finite resource.