I love playing DDR, I just haven't been able to play since we moved into a 2nd floor apartment (Unless our downstairs neighbors are being loud themselves).
There is actually a clone of DDR for Windows, Mac, and Linux called <a href="http://www.stepmania.com/stepmania/">Stepmania</a>. You can build your own patterns out of songs with it and everything, so it is kinda cool. I have some that I was working on using Mindless Self Indulgence songs.