Yeah, mat will always own. I posted a thread on this but no one responded. I love DDR and I hope they make one for Wii. That way I don't have to even look at my PS2 and it's disc read errors ANYMORE!
Yes, and Yes. Great game, although much easier than the other DDRs. It's called DDR Mario Mix, and it can honestly be a bit difficult to find, but it's well worth it. Plug the pad into your Wii, sliip in the disc and you're ready to go. Good luck!
What would make an awesome DDR is if the mats are wireless, other than that I don't really see any more innovation happening, unless it's making optional hard pads, so you can finally play with your shoes on.