As StickOS has a great support for wireless communication I've made a ZigFlea board for the CUI32 with CpuStick as a background ( http://www.cpustick.com/cpustick.htm ). As the pictures show it is made just to put on the top of the CUI32. Then it will be possible to remotely control and program another CUI32 wireless. You could also remotely control pin variables from one CUI32 to another. Everything easily programmed in StickOS. The board will hopefully be available from Sparkfun at some time, but updated eagle files is uploaded at http://code.google.com/p/cui32/source/browse/#svn/trunk/eagle .