I regularly use headlamps in my construction repair work -- in attics, under foundations, in walls, etc. I've got several headlights but they just aren't bright enough.
Things I would like to see:
1) three or four AA batteries
2) durable battery holder at back of head
3) one or two cree heads with varying power and focus
I did find one vendor with a cree headlight but unfortunately their rates are skyhigh. Even tho this is a tax deduction for me, I can't justify paying this kind of money:
http://www.foxfury.com/products/pro_series/index.htm
(their cree heads are "3 watt" models)