Thought I'd share my most recent completed "For 2009" project.
"Use Google Maps (or another online mapping system) to find a city you previously did not know existed. Do this by clicking randomly on the world map while also zooming in. Stop when you have found a city you do not know. Now use Google (or another search engine) to find an exact mailing address to a place in this city. To the address you have found, send a simple note stating: HELLO FROM (write your location here)."