Or any keyboard for that matter? I want to play MK9 on keyboard keys for both PS3 and Xbox 360.
Going to Evo this year I want to spook kids with my keyboard.
Isn't the PS3 native keyboard allowable? I've seen people post about being able to directly connect mice and keyboards on the USB ports and working.
This guy uses the HHKB Pro 2 for SFSo I'm sure it'll spook some people despite the fact most fighting games are digital and not analog control since it's non-existant since the joystick are just micro-switches or hall-effect.
Another thing you might want to check out is the Stickless hitbox, apparently the guy who made despite having a backlog is making them tri-modded so it can be used on PS3/360/PC.
http://shoryuken.com/forum/threads/hit-box-the-stickless-arcade-stick.122799/It would actually be superior to the keyboard(plus a little less easier to lose especially with the price of the HHKB) for the lack of buttons so it would optimize your input and reduce the chance of hitting another adjacent key.
Only negative I guess is losing the use of the topre switch and having to utilize the large state plunger and microswitch. Shame they don't make a topre-capacitive switch for arcade buttons.
Not only have people become interested in this device but apparently the guy who runs it is a sponsor for a tournament and managed to get one of the pro-gamers to switch over from using a stick to the hitbox for the upcoming tournament.