Muah! DDR is one of the best games ever! XD You actually get some exercise! And it's not finger exercise.... which I get enough with the piano anyway =P
Anywho, I currently have DDR Max 2.... can't wait for DDR Extreme to come out for PS2! ^__^ It supposedly has over 100 songs to dance to o_o; That's a lot compared to the older games... I think Max 2 only has about 60 songs....