Legal Guide for Bloggers

The Electronic Frontier Foundation has a helpful online legal guide the Legal Guide for Bloggers. This is a very good resource and is broken down into several key topics:

Defamation: The Bloggers' FAQ on Online Defamation Law.
Intellectual Propery: The Bloggers' FAQ on Intellectual Property
Trade Secrets: Chilling Effects Clearinghouse's FAQ on trade secret law.
Privacy: The Bloggers' FAQ on Privacy

Paper: How to Blog Safely

The guide also has an excellent set of resources.

Podcasting Legal Guide
Chilling Effects Clearinghouse
Media Law Resource Center
Libel And Related Lawsuits Against Bloggers
Stanford University's Fair Use Site