Jon Udell – Can the Noosphere Save Us?:

"We are all continually discovering useful knowledge that we want to share. Until very recently, it was costly to transmit that knowledge beyond the local sphere: friends, family, tribe. Now, suddenly, it's free to address the whole world. The only cost is your time. Of course that is the scarcest commodity. But you already invest your time in the crafting of messages that you deliver only to the few. When appropriate, consider placing those messages in online venues where they can also inform the many."