Then, human kind sent objects into space.
Then, human kind sent itself into space.
Then, human kind landed on another world.
Human kind can tweet....from space!
Yes, despite the lack of air that might be required for more traditional tweeting, extra-terrestrial electronic tweeting is alive and well! Just ask astronaut TJ Creamer, who thanks to him, you can follow someone not on planet Earth.
As a self described geek, this combines at least two of my various obsessions: The Internet and Space. Col. Creamer's older posts appear to him working on getting it working: presumably tweeting by a proxy on earth. But now the middle man can be cut out, at least mostly so. One site suggests that the tweeting (and web access in general) is actually done via taking control of a computer on the ground, ala remote desktop.
Nevertheless, allowing astronauts to have internet access on the ISS can only help to further and promote space travel. With access to resources like Twitter, Facebook, even VOIP products, hopefully astronauts won't feel quite so isolated, which may encourage more travel. Let's just hope they don't get any viruses. But then again, they should probably be using Linux anyway :).