Apparently, the folks over at social media judgement juggernaught Klout have put all their development effort into their ranking engine. This shot, from their page on how to assert your dominance (share your Klout score) over those you influence shows they are kicking it very old school when helping users embed the score on a web site.
Yep, the good old fashioned IFrame! Nothing influences people in your network like exposing them to XSS attacks. Seriously though, given all the work that had to go in to connecting to Facebook and Twitter’s API, someone couldn’t have put together a script source file for this?