Came across this very interesting article on the register
"A British-led Japan-based group is building a free-software-powered flying robot for use by disaster relief organisations – and at its heart is tech darling the Raspberry Pi.
There are lots of uses for the £30 Pi, from an educational device to a media player, if you can get hold of one of the boards. OpenRelief is planning something rather more ambitious: to use the credit card-sized computer as the brain of an autonomous flying drone – not as a killer robot, for once, but to help save lives instead."
More of the article http://www.theregister.co.uk/2012/06/12/raspberry_pi_drone/