Response to group 3's reading

The most memorable part of the reading is what Henry Jenkins said in his blog, Digital Land Grab: "Copyright law was originally understood as a balance between the need to provide incentives to authors and the need to ensure the speedy circulation and absorption of new ideas."

If we interpret and update the copyright law in that spirit, what would the law say about content that used to be in our journals but now on the web for non-profit sharing purpose? What does "fair use" mean?