The United States Library of Congress will archive all public Tweets since Twitter started in March, 2006, it was announced today. Separately, Google said it will search that archive. Both announcements were covered by various media, including Wired.
According to the article, "The Library of Congress’s blogger Matt Raymond says there’s research gold to be found in the archive: I’m no Ph.D. but it boggles my mind to think what we might be able to learn about ourselves and the world around us from this wealth of data. And I’m certain we’ll learn things that none of us now can even possibly conceive.”
The article adds, "For its part, Google thinks you shouldn’t have to wait to start doing sociological and anthropological research into the Twitter archive — so it’s turning on a feature that lets you choose a point in time and start to ‘replay’ the short-form messages from that point on. Google’s search combines Twitter updates with those from MySpace, Facebook and its own fledgling micro-publishing service Buzz."
Google search of Tweets will be limited at first, but it will eventually go back to March 2006 as well.