Update! We have a winner. Cli.gs received 26% (88) votes with budurl.com coming in a close second. Congratulations!
URL shortening services were initially popular because web addresses started to get long and links would break when sent in an email. However, as microblogging services like Twitter have become popular, an increasing number of services and applications, including tracking & metrics, have been added to the basic URL shortening features.
Recently I polled followers of @leeodden on Twitter about favorite URL shortening services and received a great response. Thank you to all who responded! So many people replied that the following mini-review was created of 11 different URL shortening services showing which offer customization options, statistics, 301 redirect and some of the other unique services like export to CSV, bulk shortening and displaying ads to monetize the traffic to links that are shortened. Enjoy!