New Hardware (PC Engines APU2)

I have sat here a PC Engines APU2 http://www.pcengines.ch/apu2.htm (actually an APU3A4) and whilst wondering what to do with it, I noticed that its on the firmware list for most linux distros, and coming with a wan port and two lan ports made me think, has anyone had a play with these devices. The one I have I am considering installing asterisk on and sticking a backup 3g sim in it.

Any thoughts or ideas?