The Freetronics LeoStick from Tronixlabs Australia is designed to be functionally similar to the Arduino Leonardo, but given the "honey, I shrunk the kids" treatment!
Just pop it into your USB port (no cable required!) and upload straight from the Arduino IDE. We've even included on-board RGB LED lights and a speaker in this handy sized board. All the usual Arduino pins are present and each LeoStick comes with low profile header sockets for plugging in modules, special tiny shields, and wires.
To make prototyping easier with the LeoStick we also have the matching ProtoStick boards.
Features of the LeoStick include:
<<<< You must read and follow the Getting Started Guide before using your LeoStick >>>>
Please note: Although the LeoStick is Arduino Leonardo compatible it is not a Leonardo. The LeoStick is also a very complete ATmega32U4 breakout and USB board by itself and the LeoStick can be programmed directly from the supplied standard ISP header by AVR Studio, Mac OSX-AVR, avrdude, WinAVR etc.