Note, RR is not an overkill light. Top teams are using Lupine Betty (1500 lumens, 865 eur), Wilma (900 lumens, 500 eur) or Mila Nova (2000 lumens?, 450 eur). Some are using Pezl ultra or 1000+ lumen HIDs and some have bought now iBlaast II. In the front row of Tiomila 2008 start line there was only couple of 20W halogens. In the back row almost all were halogens. RR is just about average light.
I think our club members has used about 4000 eur for headlamps during last year or two, several of us has bought Wilma, including me. This experiment was just finding out is there a cheaper alternative and how hard way it is to go.
Making RR costs less than 100 eur (lamp, wires, drivers, thermal adhesive, battery & charger etc. without the priceless retro headband). Hattivatti one was made of left over parts, I guess making one would cost about 40 eur. But it is just a trail jogging lamp., not a O light.
Bomb, Ay-Up is a one of the nicest lights there is but getting those is not much of a choice here really. You would need five of them to get the same output as Lupine Betty, the one most top teams are using at the moment. Maybe you would do just fine with 2 or 3 dual ay-ups, but It would weight and cost quite a bit too.
This change hapenned about two years ago when HID and LED tech made the old 20W limit rule obsolete and the O federation of Sweden removed the 20W restriction.
Here is a nice youtube video of the 10mila start. Yellow ones are old halogens, no many of them in the first row. You may also be able to compare beams on ground right after the start.
http://www.youtube.com/watch?v=ACRW7e4l9z0