I was at the drug store earlier today. I had just locked up my bike and hadn't turned off my Planet Bike Superflash(http://ecom1.planetbike.com/3034.html). I had changed the batteries yesterday. So it was super bright.
Another cyclist came up to me and told me that, since he did a lot of night riding, he wondered how he could get one.(surprise, not dismay)
I hope he remembers the website. Because, He sounded like he wanted to be properly lit at night. No 'ninja' riding was in his future from the sounds of it.