http://www.youtube.com/watch?v=_-MYQ38u1rU
More details here: http://realclearpolitics.blogs.time.com/2008/11/14/labor-begins-its-push/
The gist of the ad is: Don't wait for bosses to have attacks of conscience to give you benefits and job security; you have to support the EFCA (and the implication is - unionize).
It's by a group headed by David Bonior, rumored (but not likely) to be head of Obama's Dept. of Labor, and who has also been recently calling for an Obama New Deal, too.
-B.