DDR for the ps3, couple questions..?

OVERVIEW:

I was hoping for a good DDR game for the ps3..

ISSUE:

The only DDR game I've found for the ps3, did not look at all impressive, few songs, all of which seemed to be either outdated, or modern (rather lame) pop culture American music. (ie. New Kids on the Block, Justin Bieber, Jordin Sparks, etc.) .. When I play DDR, I've always preferred a more up-beat techno song myself.

QUESTION 1:

Is this really THE only DDR out for ps3? / can I get other songs without buying the game?

QUESTION 2:

I saw someone playing some version of DDR in an arcade, he was playing a dubstep song. I don't know the song or what the DDR game was, question being: Does anyone know what game it was, and if it's available to buy?