Just thought I'd drop in my 20 cents worth as well.

I didn't have much luck getting cgminer to work, but I'm running 2 blades (4 boards) quite successfully using BFGMiner 5.4.1 with the following config:

bfgminer.exe --scrypt -o stratum+tcp://scrypt.usa.nicehash.com:3333/#xnsub  -u username -p d=2048 -d gridseed -S gridseed:all --set-device gridseed:clock=775,chips=40

I've just knocked down the clock speed to 775 so as to not overheat them, so it runs comfortably around 10-12mhz, with .5% error rate over a week say.