Knog, the funky Australian component maker, won a Gold IF award for their Beetle bicycle light.  The Beetle is a two-light LED with a silicone body and an easy-on, easy-off mount.  It runs for about 130 hours in blinky mode on 2 AA batteries.  It’s only 12g, comes in a rainbow of colors (click on thumbnail for a sampling) and you can get them with either red or white LED’s for front or rear use.
Oddly enough, the light’s not even featured on Knog’s website, but you can get your fix here (or find pretty much anything else from Knog).