Here's a list of tiny url generators which I found and will re-post here.
If you were at my Twitter for Business presentation last Thursday nite at the LA SPUG group you know that tiny URL's are used when posting links to Twitter. They take the full URL and shorten it for micro-blogging.
Personally I use tinyurl.com if only because its easy to remember the name but there are lots of others. Check out this post to see a good list!