Here is a sample sqworl that i created - http://sqworl.com/edit.php?i=2a12f7
My common usecase is - A friend ask for some links during an online conversation. I paste them then and there. Later some time, eithier I myself need them or the same friend asks for them again. It becomes time consuming to search and retrieve them from the chat history; worse still - if the chat client does not store history(Yahoo messenger for eg) then, the links are gone forever. Sqworl comes in handy here!
Another use is to share links in an email. A small short link looks much better than a bunch of long ones. Also, there is no risk of newlines or any other characters breaking up the link(s).
Sqworl reminds me of Microsoft's ThumbTack but, sqworl's UI is extremely plain, simple, efficient and loads in an instant as compared to thumbstack.