travel expenses..

Hi

I am looking for a comparative list of travel expenses.
Does anyone know of a site that compares costs in different
contries/regions.
Accomodation, food, local transportation and so on.

We properbly all know that india is cheaper than Japan, but how does Brasil
compare to Agentina ?
I know that Lonely Planet has some information about Money and Costs, but
its a bit tricky to compare all the contries in a region when expenses are
written in local currency.

Thanks for your help.