I'm not a hiker-type backpacker myself, but this cheap and compact lil device makes me wanna be:
Weighs 10 grams, costs almost nothing, runs on cheap alcohol and is about as tiny as you could want. Would go perfect with this ultra-portable grill:
Now, if I could just find some sort of collapsible pot and pan set...
BONUS: Also from the fun people at Instructables.com, Altoids Survival Kit: