sure: at the moment you can do this by connecting audiocubes to a laptop and then send OSC or MIDI from the laptop to the arduino.
Another way is to use the flext Max/MSP or PD external for audiocubes - you can hook up your arduino to max/msp as well as the cubes to max/msp and then just pass data around between the two.
Finally you could also create a USB host using arduino (?) and connect the cubes that way. If anyone wants to do that we're happy to help with the protocol details necessary.
Power wise: the cubes have an internal rechargeable battery which is happy to charge from 100 to 500mA from a USB port.