The Now Web Competition.

If something just happened, where would you go to find out about it? Not Google. Twitter!

Fast forward to today and take a simple example of how Twitter Search changes everything. Imagine you are in line waiting for coffee and you hear people chattering about a plane landing on the Hudson. You go back to your desk and search Google for plane on the Hudson — today — weeks after the event, Google is replete with results — but the DAY of the incident there was nothing on the topic to be found on Google. Yet at http://search.twitter.com the conversations are right there in front of you. The same holds for any topical issues — lipstick on pig? — for real time questions, real time branding analysis, tracking a new product launch — on pretty much any subject if you want to know whats happening now, search.twitter.com will come up with a superior result set.

John Borthwick's article is worth reading in full.