On 7th February 2007, Google opened Gmail to everyone. Invites were no longer required to create an account on the email service.
Twitter has been used from space. "Hello Twitterverse! We r now LIVE tweeting from the International Space Station -- the 1st live tweet from Space! :) More soon, send your ?s" was the first tweet sent by astronaut TJ Creamer (@Astro_TJ) on January 22, 2010. [more...]