There are some interesting solar/crank lights out there, but so far I have not jumped into the market.
The lightcap is one that I have been intrigued by. At 9.7 oz for the water bottle / lantern combo, it sounds like a good idea but is still quite a bit heavier than my current headlamp with spare batteries and an aquafina bottle.
Still, the idea of not worrying about batteries appeals to me. Same with woodburning stoves, firesteels and using natural material as TP.
Cant wait until petzl puts out a handcrank light....