There was a link in the thread about building your own DDR pad to a website that had a video (go to the one that said "Best example I have seen").
I personally think Pump it Up is a bit better if you really want to go Crazy. The step design is a bit more conductive to going wild. Plus, DDR can get so nuts that you hardly have a spare millisecond to do anything cool. I usually play Pump it Up about 10X as much as I play DDR.
Another reason I play Pump it Up more often is because you usually have to fight a horde of 13-17 year old kids just to get on the DDR machine in the first place.
I wish someone would have got a picture of me flying off the dance pad last weekend. I was doing "Run to you" (Bounce), and at the end was spinning 360 degrees on each jump, and I spun right off the pad. It was kind of funny I thought.