See http://www.webpronews.com/topnews/2011/02/17/greplin-open-to-everyone-search-across-facebook-twitter-gmail-linkedin-etc

<< Earlier this week, Greplin announced it had
   raised a new $4 million from Sequoia Capital, and revealed that it might open up to the public this week. Now it has. Until now, it has been in closed beta, and now everyone can see what it's all about.
.... >>