Trying to mine with these on a pool that only accepts higher difficulty shares is an exercise in frustration. You pretty much have to mine on a pool that has lower difficulty stratums to choose from, or vardiff. Higher difficulty pools means your Gridseed miners won't get shares accepted as often and if any of the 10 you have connected to a controller takes too long, it'll reset and start all of them over.
It was my understanding that they were going to be releasing an updated firmware to correct this problem, but I have yet to see anything. It's getting pretty frustrating.
I'm using the instructions provided in the above post from poopypants...I'll let the Raspberry Pi running minerd run all night to see how stable it its. Just FYI, but i'm seeing ~100watts and 3000-3200kh...so not bad so far. The miner is currently pointed to TheMagePool.com...so I'm not sure how the hashrate will fluctuate given that its a profit-switching pool and selecting different coins to mine.
Edit: I Skyped with one of Jack's tech support guys yesterday and he told me that jack is currently testing the new version of the firmware on his farm. At the time I skyped the test had been ongoing for 14 hours. In theory Jack would release this if he determined the new firmware was stable. I tried to reach out to them today but no one answered my skype mesgs.