Here is an interesting tidbit about Facebook, and the potential threat to Google.

Facebook has more than half a billion users, and half of those log on every day.

These people spend 700 billion minutes on the site and share 30 billion pieces of content. Links are being shared and people are clicking “like” to vote for that content.

And it turns out that it all adds up to a pretty useful search engine experiment on Blekko.

via Google’s Wizard Of Oz Search Algorithm And The Threat Of Facebook Search.