If you are talking about the U2 usb sticks, connect one to a solo mining pool using a raspberry pi and sell the other.

Yeah all down to cost, wish they opted for a proper heatsink for an extra $1 or so, possibly reach 4GH/s~, the BFx2 with large heatsink for example can run (as designed to) passively at the rated 4GH/s stable without extra cooling, the heatsink is around 3x as thick.

IIRC the Avalon GUI Miner all use bfgminer v4.7 or earlier so performance is pretty much the same, I see they have uploaded a firmware for the Nano, anyone know how to flash it?

http://downloads.canaan-creative.com/software/avalon_nano/firmware/latest/

The Avalon GUI Miner linked in the OP is buggy, the hashrate shown on that GUI Miner (effective/current value) is well off.

Updated Avalon GUI Miner here with fixes: http://build.canaan-creative.com:8080/~wenbin/AvalonMiner/20140827/

I've not been able to get this Avalon Nano stick working with any cgminer builds (certainly not on a raspberry pi 2), the latest bfgminer v5.x builds do not work at all, I tried bfgminer v4.7.x and v4.9.x builds that work, bfgminer v4.10.3 performs best in terms of effective hashrate.

Mining with one Avalon Nano stick without cooling the effective hashrate is around 2GH/s or less, with active cooling it performs at the rated speed of 3.6-3.7GH/s, running bfgminer v4.10.3 on PC (tested on both Windows 7 and Linux).

On the raspberry pi 2 I had a problem with bfgminer detecting the usb stick (running root) even with -S ICA:all switch.  The stick is clearly present via lsusb (NXP usb device).

The "heatsink" on these sticks is truly abysmal