tweeting with extraterrestrials

A friend posted about Hello from earth on Facebook. It's an Australian site that's collecting messages to be transmitted to Gliese 581d, a planet outside our solar system which may support life. They give you 160 characters to write your message in, which feels like a luxury compared to Twitter. And you've got until 5pm Monday 24 August 2009 Sydney time, or 07:00 GMT the same day, to write yours. In the spirit of conversation and learning from each other, this felt like the most appropriate message I could send. What sort of a message would you send?