PRSA Code of Ethics
The latest version (2000) of the code in its entirety

PRSA
Industry and membership Information from the largest organization for public relations practitioners

Oh No News
Images and news that have made company executives go "Oh, no!"

The Museum of Public Relations
Wonderful biographical information on the founders of public relations

Art Page Society
Features Art Page's Six Principles and news from the PR industry

PR Web
Articles written by public relations counselors and lots of news releases distributed by Fortune 500 and other companies

PR Newswire
Archived database features corporate and other news releases from the past three days to the past three years