Interesting mount. I'm not sure how that would work on mine, and I'd have to get a light to mount to that (my setup is all homebrew), but I'll keep that in mind. Peter White seems to have quite a bit of lighting stuff listed on his page there.
Oh, and I did take it out for a ride last night. The line is annoying, but not that bad, really. Maybe I should put a second light on, for dual lights.