+1 for the superflash. The LBS owner ordered them in for me after asked about them, (he's also big into advocacy so the profits thing caught his eye.)

We were looking at how to turn them on, I figured it out and it caught us both in the eye as we were up close to it. It was lighting up the back wall 40 ft away with the lights fully on in the store. $23 bux. Cars now pass me an extra lane over.