Here is a hardware hack to turn a small MagLight into a laser that can light a match or campfire kindling.
1 MagLight (or similar) flashlight as a housing.
1 Class III or Class IV laser from a cheap DVD burner.
Electronic and soldering know-how.
WARNING: Class III and Class IV lasers are DANGEROUS - do not attempt this project without appropriate eye protection and other safety measures.
Even with the safety issues, lighting a fire with a portable laser weapon has got to be the ultimate hardware geek dream.