This thing is awesome:
[VIDEO]http://www.amazon.com/Black-Diamond-Sprinter-Headlamp-Titanium/dp/B003PQW4LO]Amazon.com: Black Diamond Sprinter Headlamp (Titanium): Sports & Outdoors[/VIDEO]
Great visibility, super light, and is USB rechargeable. It has a blinking red LED on the back as well. Definitely worth the coin if you're like me and need to do your running in the dark this time of year.
Nice, I've been using an annoyingly bulky forward facing only one recently. If I happen to have spare money any time soon I might see if I can grab one of these.