Links from my friends

Unions:

International Alliance of Theatrical Stage Employes - The IATSE is the labor union representing technicians, artisans and craftspersons in the entertainment industry, including live theatre, motion picture and television production, and trade shows.
URL: http://www.iatse-intl.org
American Federation of Television and Radio Artists - The American Federation of Television and Radio Artists (AFTRA) is a national labor union representing over 70,000 performers, journalists and other artists working in the entertainment and news media.
URL: http://aftra.com
Screen Actors Guild - Screen Actors Guild is the nation’s largest labor union representing working actors.
URL: http://sag.com