Just how far will your dollar go?
One of my favorite monthly articles on Frommers.com is the Global Price Index where the editors compare prices at different locations in the world. As one might expect, Mozambique is cheaper than Venice, but again Venice prices are reasonable when comparing them with Manhattan, NYC. According to the January 2007 article, you might want to skip Tahiti and go for Venice, after all.
A good place to start converting currency is this site (rates will vary on the streets of Venice, of course - just watch our for the commission).