Rico - Actually, the best player is Yasu (Japanese)/JSB (American). But, because it's kind of hard to get a hold of them and to ask them to make videos, I gave links to Alex, who is a pretty good player who is on the CobaltFlux forums, so he posts videos regularly (Keep in mind that the home versions of DDR have timing that's A LOT easier than the arcade versions)
The joystick shouldn't be used for controls. I think this would be better:
Start - Down
Select - Up
L - Left
R - Right
And for the chatboard, just choose any four keys that are right next to each other in the same row, and make them the equivalent of the zx,. style of controls.