Tap Sonic just released their Android version.  
http://www.facebook.com/tapsonic.korea?sk=app_129072573842827

To download the App if you're not in South Korea

• Download "MarketEnabler on your phone
• In MarketEnabler, set your market code to 45006 (LGT in South Korea)
• Go to the normal app market and search for "Tap Sonic"

It has been on iOS devices for a while now, and it's a lot of fun to play on the iPad.

The game features a lot of music from the DJ Max series, and plays just like DJ Max does. I'm not sure yet if an iOS account can work on Android, or if they're separate (such as all my unlocks!). The Android app loads quick and seems to be in almost all parts as identical as possible to the iOS version which has been out for a while.