It probably doesnt exist but im interested in your stories of how you save or are saving for you big trips???
sell on ebay - first all the junk from your home and later goods from the countries you are visiting.
First you need some experience and plenty of a positive feedback there.
just live on the bare necessitites.... or have a garage sale to get rid of any unneeded things...!! also, for Christmas and birthdays ask relatives and friends for money instead of presents!!
Go work on the Oil Rigs in Canada =)... or just save enough for a plane trip to/fro and just give 'er.