I recently acquired a Spark Core, and (after some minor hassle) got it connected to my network and walked through the examples. Neat product, though to some extent it suffers from problems of “trying to make it easier for the noobs, with a failure mode of making it harder for everybody” and “everybody wants to write features, nobody wants to write documentation”.
Past the jump, I’ll explain how to get around the 32-character wireless passphrase limit, and how to use cloud compilation but with a real Makefile, local copies of your source code and your favorite text editor.