A note on Tinyurl and security
It seems some websites produce horrifically long url’s and others (such as twitter) imposes some strict boundaries, which has created the need for sites such as tinyurl.com. With tinyurl you can post a long (even really long) url on the site and have a short (redirect through tinyurl) instead. It’s pretty smart, but I really don’t like being redirected to a secret destination. On tinyurl.com they luckily have an option (if you have cookies enabled) which allows you not to auto-redirect.