We just crossed to Colombia yesterday. Here's a blog post with what we paid for regular gas Oct-Dec 2011. Enjoy!
http://www.travelingawake.com/helpful-tips/gas-prices-in-central-america/
Who would have thought that a weekend in Rio could be cheap? The clever folks at the New York Times claim a $100 weekend in Rio - what do you think?
http://frugaltraveler.blogs.nytimes.com/2011/05/10/100-weekend-in-rio-de...