Thanks Philipma1957.
My next question I guess is hard to answer since these aren't in the wild yet but what RaspPi image will work best with these?
I used RASPBIAN (Debian Wheezy) and then compiled cgminer with --enable-blockerupter. The default speed is --bet-clk 23 (which will run the prisma at 240 Mhz). On a tube, you need to set it to --bet-clk 26.
I will be putting out a packaged version of cgminer 4.7.0 for Rasbian as soon as we can get the bugs in the build system ironed out. I do not know if I will be able to back port to wheezy or if they will only be early builds for Jessie. I have a working package for Jessie now on Rasbian but want the official numbering fixes done before I let it into the wild.
Just a heads up on the rpi with these. The rpi had to be rebooted about every 6 hours as the hashrate falls. Ended up moving all the miners to a PC and they have been running for days now without a reboot. Have had similar issues with other miners on the pi.