I just had to come to make a small update; i've had all the miners running now for about 10+ hours (3,6MH/s, 850mhz) without any problems or crashing with raspian wheezy & cgminer. So yeah, although it took time to get the miners, I really think to include raspberry pi instead of the controller is a brilliant idea!

They do make a lot of noise I think- now if only there was a way to adjust the fans programmatically..