Here are articles about copyright law.  
Many are general and some are timely updated topics of interest.

Registration and Protection:

Copyright Basics - An Outline 
PART 1 - WHAT IS THIS ANIMAL?
PART 2 - HOW DO WE PRESERVE AND PROTECT IT?

Rights and How to Use Them

Clearance of Rights Basics
Fair Use: CONFU is Not a New Food
Fair Use And the Internet

Who owns the copyright: 

Acts for the Millenium: Part 2- Limitations of Liability for ISP's

Acts for the Millenium: Part 3-DMCA: 
Limitations of Liability for ISP's, Maintenance Providers