Su.pr not only shortens your url, but it sends the updates to twitter as your tweets, it shows you the statistics that include the number of retweets, number of StumbleUpon reviews, number of click through and even traffic source. You can view stats for the past 12 hours, past 7 days, or even past 30 days. And finally whenever someone visits the article through the shortened su.pr link, then the stumbleupon toolbar will be shown above the web page through which one can discover and add the web page to their stumble favorites.
If you are already impressed by the services Twitter, StumbleUpon and Facebook, then here’s a newly developed tool su.pr (call it Super). The website is developed by StumbleUpon team, which helps you to synchronize your StumbleUpon, Twitter and Facebook accounts. Simply add your website or blog to your su.pr account, and post articles from your blog just as you do it in Twitter (tweets).