StumbleUpon's new link shortening site called Su.pr made its public (yet private) launch today. Similar to Bit.ly, it shortens URLs and lets users track where they end up, along with stats on who's clicked on them. It also brings along StumbleUpon's software-free toolbar which lets users hop to both recommended and random links.
However, the real appeal of Su.pr is that it gives each shortened URL the potential for greatness. URLs can be seeded not only to Twitter and Facebook, but also into StumbleUpon's content pool where they can be discovered and promoted … Read more