Well, I didn't post there, but I will post here what I use mine for.

- Cheap servers. Use them for a little business I own. Rather than rent a box on some datacenter, I ship out the Rpis ready to be used with my software.

- Hydroponics controller. I have a small hydroponics cilantro crop. The board controls/monitors it.

- Learning tool for my nieces. They are learning to program whilst using minecraft for the pi. Plus they are also learning a bit of Python along the way. This summer we have a 2 weeks programming "camp." The Rpi will be the center piece.