I was playing around with ping.fm tonight because I spend, oh about, twenty minutes a day updating different statuses * exageration *. Then I happened on this SUPER url shortener roundup over at SEO Moz. The pros and cons is very comprehensive.
Obviously, ping.fm doesn’t fit squarely within the “url shortener” hole, but I really like that I can microblog the full URL and the service will shorten, microblog, status update, and bookmark with a single stroke of submit.