The Klout Score is the measurement of your overall online influence.

More about Klout can be found at http://corp.klout.com/kscore

You will need an API key to use this, and the API key can be found at
http://developer.klout.com/


Usage:

Get the score for a single user
$klout = new Klout;
$klout->getUserScore('aaronott');

Get the scores for multiple users (per Klout, you can only use upto 5 users
at a time.

$users = ('user1','user2','user3');
$klout = new Klout;
$klout->getUsersScore($users);