Thinking of making one or two of these, in Ti, of course:
Would be 120mm long and 21mm diameter--using an AW14670 rechargeable and a McClicky tail switch.
Added 7/14/10 -- second version of rendering:
Finished the light on July 25:
Please see post #17 for more photos of the finished light, and the specs.
BTW, the light is sold.