Short-Sight of Short URLs

Now a days we are flooded with a crowd of short URLs that inadvertently  find their way to Blogs, Posts and other such places. By nature, these URLs do not disclose the source of the content. However, once ported to a larger medium like a Blog or Forum, they need to disclose their final target. A need of the hour is to get some Plugin or Service that can either Re-Expand them to original or Tooltip them with the original URL where word limit is not a constraint. 

Example: http://bit.ly/b2NoCF becomes http://bit.ly/b2NoCF (with tooltip, hover to view) or http://timeline-studios.com/blogs/2010/02/i-would-have-loved-if-my-mobile-and-tv-did-this/ (complete URL)

WordPress Plugin Anyone?