The Raspberry Pi may well be in the public domain and a few of us who have got the boards are busily scratching our heads trying it to get it to do ‘stuff’. There are far brighter people than me who’ve managed to get ‘stuff’ done on this low cost machines and they’re shouting about it in a digital magazine called MagPi, which is available here.
It can be connected to an Arduino, which I am using as a keyer for my QRP rigs. All sorts of possibilities.
73 /paul W3FIS