Real-URL: View Real URL Behind Short URL
Real-URL serves one small purpose, it lets you see the real URL behind any given shorted URL without visting the link. All you need to do is paste in the short URL into provided field and click on the “Get the Real Url” button. The actual URL will be displayed.

Feature:
Check out DeTinyIt @ www.real-url.org



Better yet, use a Bookmarklet
http://www.labnol.org/software/browsers/real-web-address-of-tinyurl/6215/
Not sure why your post says check out DeTinyIt and then links to another site? DeTinyIt.com is our site and we have a very handy firefox addon also! Give us a try.
Now you can use the “Most shared video on Twitter” FREE XML API
Enjoy here : http://www.real-url.org/api.php
Luc