My router has OpenWRT firmware and USB port. CGminer works under OpenWRT, because it is Linux. Plug some USB hub with Block Erupters connected into USB port of the router, SSH into it and start CGminer.

I also have Efika MX ARM computer and Cubieboard coming soon (shipped but still on the way). With USB Block Erupters + ARM computer it's possible to build energy efficient mining rig with hashing power = 300 MH/s * number of Block Erupters.