I just came across this while visiting the Push for Peace Corps website. Peter Hessler's strong defense of the Peace Corps, in response to Nicholas Kristof's March 2010 critique of the organization while calling for the formation of a Teach for the World initiative, is passionate, funny, and accurate. Give it a read.
I didn't know the word for doorknob in Spanish. There weren't any doorknobs in Palacaguina. Seriously. But if you want to know how to actually communicate like a Nicaraguan, I'm your guy. America would be a wiser country if we had more people who had an intimate understanding of a foreign culture. And that doesn't require knowing the word for doorknob.