I have just started using Tr.im for shortening web page links on my Twitter and Facebook accounts. What I like about Tr.im is that I can see how many clicks I get on a link that I shortened and sent on. Simply open a free Tr.im account, and use it to shorten links while logged in. Then use that link in Twitter or Facebook or your blog (anywhere really) and you will be able to see how many clicks you got on that link. The following screen capture shows three links that I shortened and the results within an hour of sending them out.