I believe that Duolingo - http://duolingo.com/ has the potential to change language learning. The age of internet collaboration now allows 750 000 000 users to collaborate. The talk describes how 100 000 worked on the pyramids and to put a man on the moon. What if we could have 750 million working instead. Imagine the possibilities.
This just gets my creative juices going. In our school district we have 5000 teachers. If we each were able to provide 10 seconds per day, that is almost 14 hours toward a task.
What could we do with an extra 14 hours of work each day?