Twitter Getting People Out of Jail?

As if reaching critical mass were not something imminent for Twitter now, I stumbled upon this CNN article (via Twitter, of course):

James Karl Buck sent a message using Twitter which helped get him out of an Egyptian jail… On his way to the police station, Buck took out his cell phone and sent a message to his friends and contacts using the micro-blogging site Twitter. The message only had one word. “Arrested.”

Regardless of how you feel about new technologies, the fact that someone was saved from jail by twittering about it… from a remote place, deserves to be recognized as a turning point that will probably make Twitter a more ubiquitous and heavily used tool from here on out.