I created a URL trimming service at Th8.us. The URLs are shorter than Tinyurl: 19 characters instead of 25, in the format http://xxxxx.th8.us. I put it together using Hidayet Dogan’s Phurl for my Twitter account, but then thought it should be released to the world. I made modifications to the code so the random part is a virtual subdomain, is five characters instead of six (it’ll be a while before the 24 million combinations are used up), it respects trailing slashes, it links to the new address instead of just showing it in plain text, and it tells you the number of characters you’ve saved (it’ll even be negative if the original address was shorter). Also, hard-to-read characters are excluded (0, 1, j, l, u, and v). The service is simple, fast, and clean, unlike Thripp.com, which is heavy and feature-laden (flexible) and thus more prone to outages. th8.us shares no code and uses a separate database from Thripp.com, so you can count on the URLs working forever (barring problems with my host, SYN Hosting).
Here’s the first trimmed URL as an example: http://oorph.th8.us/.
Drag the one-click Twitter bookmarklet from the home page to your bookmarks toolbar. It’ll take you to Twitter and type in the shortened URL of the page you were visiting into the post box.