Nick Douglas on Valleywag wrote a fine little doodad on how your PR weasel can screw the pooch for you. Always trust the people your pitching to first and the people doing your pitching a distant second. From the article:
Training a flack is like training your entire staff. If your company only employs ten people, a everyone should know enough about everyone else’s job to explain it to me. I’m a journalist, if a fake one, and I want to hear the whole story of the company. Even an intelligent PR person can’t understand the company or its product as well as someone who made it. So why not schedule time for employees to push their own products? As a bonus, they’ll sound more sincere than the flack who was hired just last month.