Planet bike super flash micro USB strapped to the back of my helmet, and one I don't know the brand strapped to the seat post for the rear lights.

MEC Plasma USB LED front light for a flasher on the front. Not bright enough for a "to-see" light, but on flash it's great for a "be-seen" light. For a "to-see" light on the front, I've been using a Nitecore MT26 flashlight ghetto rigged on with inner tube rubber bands. Not an ideal mounting system, but it works pretty good. Waiting for some Twofish bike mount knockoffs from Deal Extreme to try them out.

Trying a couple of different flashlights just velcro strapped to my helmet for a headlight for night time trail riding to see around corners before I'm going through them. Still on the hunt for a light with good run time and output without being too heavy and bulky.