[KevinH]

Using a Guitar Hero controller is key. 7 buttons, 1 two way switch and of course, an analog input whammy bar.

There's also of course midi keyboards, but you could always get something like the DX1 input system and just build your operator controls with that. I'd love to see a laser keyboard too. Maybe a fragpedal... This was a smart move, opens a lot of possibilities to teams that wouldn't have the time or resources to build controllers themselves. I do hope that there's still plenty of custom controllers too though, PS2/PS3/Xbox controllers aren't the end all be all...