Techmoan has done a review of a new sports camera that looks good for FPV flying. It's smaller than the Crocolis cam he reviewed earlier and has much better low light abilities, plus, like the Crocolis, it's more aerodynamic than the GoPro (and cheaper).
Watch on YouTube here: Review of the RD32II 1080p H264 Sport Cam (1 of 2) http://www.youtube.com/watch?v=TKQSRQ7lfwM&feature=g-user-u&context=G2163e7dUCGXQYbcTJ33aXMDFyoLqd3yaeDkUemy32OFROa0_enyc