We still haven't seen delivery of the gaming case that's been promised for what seems like years now. The demand is certainly there for DPads, so I wonder why the huge holdup. Apple certainly makes it difficult for third-party hardware vendors to release legitimately supported attachments that make use of the connector (otherwise you often need to jailbreak).
Some games, like Tetris, racing games, and retro games, would function so much better with a physical DPad than a virtual screen based one.