I have been looking around for a second controller and saw this just now. It's a new Fight Pad for the PS3, made by Hori and it's going to be released on August 26 for the sum of $34.99. The shape kinda reminds me of the Marvel PDP pad for the Xbox 360.

http://www.hori.jp/us/products/ps3/ps3_fc3pro_us/

http://www.amazon.com/PS3-Fighting-C.../dp/B0057WDD6O