The reason you don't see a lot of 360 and PS3 dance pads is because Sony and Microsoft realized that they can eliminate third party competition by requiring specialized controller hardware licensing to make controllers that operate with their systems, so it costs about 40-50 clams just to get a chip that will work with either.
I think a handful of MMB's pads have been 360-compatible? Maybe not. Might be worth looking into. It'll probably be easier to just download the Universe songlists from zenius-i-vanisher or DDRUK and play on StepMania than trying to find a pad that will work with them.
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I used to be active here lol