Batteryspace Update
Sorry if this info has already been posted, I haven't been keeping up on this thread.

Batteryspace.com has some new stuff since last time I looked. They now have full ready-to-go LiIon/charger/13W HID setups for about $220. I built my own HID from their parts but this would be tempting if I were doing it again.

They now have the 30W HID in stock for $160. That would certainly be a hell of a blowtorch! They say 100W halogen equivalent.

They also have a few mounting brackets and odds and ends that might be useful to folks on this thread.

I notice that they are now indicating to use ONLY 12V & 13.2V NiMH or 11.1V Li-Ion battery packs with their bare HID bulbs. I had a disagreement with them after I used one of their 14.4v packs (which they claimed was "perfect for HID") and it fried the HID in 3 hours. Glad they changed their tune on that.