Android device with Arduino and Monotron

YouTube via TheCryingGadgets — May 18, 2010 — "A step sequencer application on android mobile phone controlled Monotron.
Android is connected with Arduino by bluetooth.
Arduino is connected with Monotron.

Android programming and Arduino Programming : S_Ishimaru
Monotron pitch control circuit design : Denkitribe
Video edit and musics : S_Ishimaru"

Now seeing this makes me really think about getting an Android device (not that I can currently afford it). Via Matrixsynth.