StumbleUpon new URL shortener Su.pr is out of beta and available to public. This is not just another URL 
shortener service it comes with some great features which you will not find in other.
With Su.pr you can expose your content to StumbleUpon. It can submit your content to Twitter & Facebook. You can keep track how many time your URL is clicked.
Su.pr comes with some different analytics which tracks click to your URL, rating of your post etc. With one click you can submit your post to Twitter and facebook. It is fully integrated with StumbleUpon so you can login with your StumbleUpon id.
You can schedule your post to submit on Twitter and facebook on a given time. You can keep track how many visitors are send to your site thru StumbleUpon. Su.pr can be the best URL shortening service.
