The Micro at US $30 http://www.radioshack.com/product/index.jsp?productId=17207736, which seems to be a Leonardo in a breadboard factor. Now, the silk screening certainly looks like Arduino's, but it isn't listed in the arduino.cc list of official boards. I suspect it may be a special deal where RS has an exclusive on the board for a couple of months, like the Esplora, and then it will be more available
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