I know my lights are on in several pics, so it may be mine.  I use the ay-up lights.   There are brighter light out there, but these are small, light, and one battery lasts for 6 hours.
 
http://www.ayup-lights.com/

Quote from JimFPU on Sep 23^rd, 2009, 7:32am:

 
Actually, there pricing isn't that bad for what you get.  This past weekend I rode with a guy who was using them, they have enough intensity in their focused beam to overpower my Moab (and that's a very pricey light, but it's a wider throw than the Ay-ups).

Sorry, just not used to those kind of prices...but since I'm riding more in the early AM, I suppose I need to up the budget for something better than the 'position' lights I have...

Those Cateye lights etc fill a niche, and are better than nothing.  However as soon as you look at running all night, and with enough lumens to spot those killer armadillos you start up the $ slope rather quickly.   Your basic Dinotte at about $120 is rather hard to beat.  For the next level up the Ayups and better Dinottes are excellent lights.  I run a couple of Fenix flashlights that check in about $120 also but lack the mounting ease of a bike specific unit.  Also there are large amounts of discussion bandwidth dedicated to the subject of bike lighting on the Ol' Internet.
 
Take Care,
Nelson.

Flashlights as headlights... dealextreme.com has a bunch of SSC P7-C LED based flashlights that could work. You might want to comb through reviews to determine which ones are decent and which ones are not as good. I got the following early this year:
 
Flashlight:
http://www.dealextreme.com/details.dx/sku.16092
Batteries:
http://www.dealextreme.com/details.dx/sku.5790
Charger:
http://www.dealextreme.com/details.dx/sku.6105
Plastic bike mount:
http://www.dealextreme.com/details.dx/sku.15642
 
$36.45 + $8.18 + $7.92 + $2.55 = $55.10 + shipping for a one hour 700+ lumen headlight or about 5 hours at 200+ lumens per cell. I bought two of these sets with 4 cells each. Used one for the hc600 and we used both on trips. Did great once I put a little spacer in front of the battery to keep it from switching modes when I hit a big bump. There are two switches in the thing. The one at back is the power switch and there's one up front that is a mode switch. When you hit a bump just right it slams the battery cell up against the front mode switch hard enough to change modes. I cut about a 1/4" long piece of 1/2" CPVC tubing and mounted it in front of the battery cell around the front spring to essentially stiffen the front spring. This still allows the mode switch to work but you have to press it a little harder. The reflectors aren't really intended for road use so you need to be a little careful about beam spread wrt oncoming traffic. I plan on running two of them up front for the TTTT Fri night. See how they do there.
 
On the Bacchetta list recently someone mentioned the P7-based MajicShine but I don't know anything about it personally:
http://www.bacchettabikes.com/forum2/tm.asp?m=57918
http://cgi.ebay.com/MajicShine-LED-Bike-Light-900-lumen-P7-Li-ion_W0QQitemZ27045

I've used a TrailTech (www.trailtech.net) MR-11 setup that's an HID with a 5.5 hour battery, cost about $300, with handlebar and helmet mount clips...  lights things up nicely.  Only negative is that they don't make a thingy to attach the battery to a crossbar or frame piece, it's got a "clip" that mounts to a motocross chest protector.  So I've been using a velcro-wrap-closure bag from another light battery, that let's me strap it to the handlebar/riser.