Would be great if a user can access the TinyURL for confluence via convenient way. For example adding a button to the page metadata may be the best way to go. page-metadata.vm
When user clicks on the button, a pop-up containing the tinyurl of the page appears. S/he can then copy and paste it to use for sending emails or other.
Easier than each time needing to go to Tools->Info to fetch the tinyURL.
Overwriting the TinyURLServlet may be just far too hard to have the tinyURL of the page displayed in the actual browser's address bar.
Clearly, other page information may be contained in the pop-up !