I found this really amazing as I had thoughts of doing something similar. This gentleman overhauled his alarm clock to run Linux.
I have always been fascinated with small computers. I have a Chumby, some ZipIt Z2s and I had a plug computer that recently died. I’ve been considering replacing the plug computer with a small Linux arm computer. My prerequisites are: Wired Ethernet, Silent, Low Power, ability to host source control and ssh. Video output would be nice. I have been hesitant to spend too much, because I have previously bought them and barely used them. So far I have seen two contenders, NanoPC-T1 and the ODROID-U3.
I am a bit of a tech hoarder, so I have to liquidate some previous older computers before I buy anything new.