Artist Trust - a non-profit organization dedicated to supporting WA state artists working in all creative disciplines

Backstage

Entertainment Careers - Great resource, lots of listings

TV Jobs & Internships

Playbill

Theatre Communications Group

Yahoo Directory of Theatre Companies - Find Theatre companies and contact them directly

Smithsonian Institute

Seattle Art Museum - Contact the volunteer department with specifics of what you are looking for in an internship.The don't post internship positions, but do accept interns

Experience Music Project - The EMP is dedicated to the exploration of creativity and innovation in popular music.

Journalism Jobs - lots of great opportunities from photography to marketing to editing

American Society of Newspaper Editors