Well I just unpacked my DOD Hummer motorcycle Dashcam, and boy am I a happy camper. It's presented as a purpose-built motorcycle dashcam, and its not cheap, but so far it sure looks the goods. It includes multiple powering options ... 5V USB, 12V ciggy lighter, 12V off the battery using the fuse block thing that Shiney mentioned (two of them, in fact, for different style fuse blocks), and they are all watertight fittings. For mounting it offers both a 1/4" tripod mount and a GoPro mount, it includes GPS and it does wifi to a smartphone app. There might be a review in the works.