I wish I was into fighting games or had some sort of appreciation for arcades back when I visited the Philippines in '06... There were arcades in so many malls that we went to, and I specifically remember seeing Pocket Fighter but never trying it. Too bad... that game looks hilarious from the youtube clips etc. that I've seen of it.
But yeah, the only place that comes to mind to suggest a game would be the PSN forums. I think I remember seeing some sort of place on that site where users could post suggestions and others could bump them up or down depending on what they thought of it. (à la digg)