With Blender's rapid development, tutorials tend to get outdated pretty quickly. Some are worth updating, while you may have to let others go. The CG Cookie crew has decided to put such tutorials in a freely accessible archive. Many of then were 'Citizen only' before, meaning you had to be a member to access them. That's a pretty cool initiative guys!
"Sometimes a tutorial just needs to be put to rest. However, we still think you should be able to access it...just in case."