I got a new headlight today and it has blinky blinky blinky mode. It's a Serfas HL1. It worked nicely but I must say, the mounting clip leaved a lot to be desired. It was quite a pain to get the light onto and off from it's "quick release" slider. After about an hour of fiddling with the light with Bryn from Continental Ski and Bike and a second light from the rack, we were finally able to get reasonable performance from the mount.
(Image from Serfas website)
www.serfas.com: HL1 Headlight