Camera ball for taking 360 degree panoramic pictures

-- work in progress --

What I'm trying to build is a ball of six cameras able to take 360 degree panoramic pictures. So far I printed the supporting structure for holding the cameras and I soldered some wires into the cameras in order to be able to release the shutter via an Arduino board.

The idea is to be able to throw the ball into the air and the have the cameras triggered automatically by the Arduino.

I'm still missing a way to fix the Arduino and a battery. Also I'd like to add some safety features in case I miss the ball after having thrown it into the air.

The cameras I use are of this type:
Polaroid XS 100 (http://polaroid.com/xs100)
or this, which seems to be the same:
Easypix GoXtreme Xtasy
(http://www.easypix.eu/de/GoXtreme-Xtasy-Full-HD-Action-Camera)

Any ideas for improvement? Questions?