We've seen plants, fetuses, churches, eco-taxis, and primates, but the all-new Lufthansa MySkyService lets passengers on planes tweet as well. When you sign up for the service, your flight's position will be automatically tweeted--with a link to Google Maps, of course.

Lufthansa MySkyService is a fun way for your friends to keep tabs on you while you're globe-trotting. Best of all, it works on both Facebook and Twitter. Check out more unusual Twitter users below.