Communications/Media/Broadcasting/Public Relations/Event Management

J-Jobs Bank - jobs and internships via UC-Berkeley Graduate School of Journalism
Newslink - links to newspapers, magazines, TV/radio and more; search for jobs under "Joblink"
O'Dwyer's Inside News of PR - includes PR services, firms, rankings, job listings/advice
Professional Convention Management Association - national and international jobs and internships in event management
Publisher's Weekly Classifieds - employment opportunities for the publishing industry worldwide
RRonline.com - Radio & Records online; select "opportunities" for job announcements
Society for Technical Communication - great resource for technical writers, editors, graphic designers, multimedia artists, Web and Intranet page information designers, and translators
WorkInPR.com - public relations jobs and internships
WorldOpinion - marketing, market research, advertising, media, public relations
Write (The) Jobs - employment opportunities for journalism positions, editor positions, staff writing positions, freelance writing positions, positions involving technical writing and related positions