Pin it Script for Wordpress

I hope this is the right place to post my thread.
I am looking already for a while for a way to pin images to my own wordpress site, just like the pin it bookmarklet from Pinterest. I saw that other sites have already implemented (for example pinpress.net on their pinterest clone). But when you search on the net, you see hundreds of post explaining about the Pinterest pin it button, but not what I am looking for.

Does anybody have an idea on how to get that working for pinning images to your own site?

If you drag the pin it bookmarklet to your browser's URL bar while not signed into pinterest tyou'll get some javascript in your URL bar. In that javascript is the URL of more javascript used in the button, (pinmarklet.js) if you have a look at that you should figure out where to start.