One small error.. Dean wasn't endorsed by the AFL-CIO, he was endorsed by the SEIU, and the AFCSME. The 2nd and 3rd largest Unions IN the AFL-CIO. The AFL-CIO itself hasn't endorsed anyone as their rules require 2/3 of thier membership to back a person before they get an Endorsement vote.
At this point it looks like no one will get the AFL-CIO full endorsement until after the Dem Convention.