Started playing with one of them 
Very easy setup.  Installed TeamViewer and BOINC.  I have WuProp and 4 NCI tasks running and right now I'm running some BU CPU for hours/playing.  Looking at the WU hash rate versus I7-3930 it appears that the Kangaroo core is approx 1/3 the speed of a 3930 thread.  So from a crunching standpoint all 4 cores are about equivalent to one of the cruncher threads.  From a WuProp standpoint it produces 4X the hours.
I tired a quick BU Asic setup and I couldn't get it to work.  Did the Zadig driver update and BU downloaded tasks but the miners didn't turn on.  I tried running my stand alone Cgminer app and it didn't find the miner.  It can never be easy!!!!
Can someone think of a project that has VERY short WU for WIndows CPU?
BTW, it is very small ... about the size of a cell phone.