Ran across this great invention called the Kelly Kettle. It can boil water really quickly and requires very little wood to do so.

http://www.leevalley.com/en/garden/page.aspx?p=43901&cat=2,40733,40996,43901

Here is a demo video showing it in use:

http://www.youtube.com/watch?v=Ujk_49pMMsg&feature=player_embedded