I was wondering about this. My brother is away right now, and has my PS2, so I can't play DDR on it. However, when I got my PS3 roughly 30 minutes ago, I thought I'd be able to play DDR on it. I know I can play PS2 games on the PS3, as I can use the Sixaxis controller. However, there's no visible port on the PS3 for a PS2 controller plug, which means I can't play DDR.
So, can anyone tell me if it's at all possible to insert the DDR controller into the PS3 so that I can play? If not, then oh well, I can wait for my brother to come back. Any and all help is appreciated. Thanks to all who help.