In my free time I'm writing an alternative firmware for chumby devices (and possibly similar devices, if I ever get my hands on a Raspberry Pi or alike) that focuses solely on streaming radio services (ones which have usable open APIs) with no dependence on the chumby backend servers.

All of the app layer is written in Go with a custom widget set and pure Go rendering right out to an mmaped /dev/fb (the rest of the firmware is a lightly customized openembedded build).

This won't make any money but it is teaching me a lot of Go.