Plugin request: when a user copys text, automaticly insert url.

Is there a plugin that will automatically insert url to the bottom, when a user copy’s text on my page? a good example of this is on this page

http://www.nydailynews.com/entertainment/arts/2009/06/15/2009-06-15_some_comic_relief_captain_america_is_coming_back_to_life_in_a_new_fivepart_serie.html

i attempted to search for a plugin like this, but i was unable to find it. if it exists already please let me know.

Thanks,

CrazySteve