Empowerment of individuals is a key part of what makes open source work, since in the end, innovations tend to come from small groups, not from large, structured efforts.
Ruby on Rails is a breakthrough in lowering the barriers of entry to programming.
Powerful web applications that formerly might have taken weeks or months
to develop can be produced in a matter of days.
The Lean Startup isn't just about how to create a more successful entrepreneurial business, it's about what we can learn from those businesses to improve virtually everything we do. I imagine Lean Startup principles applied to government programs, to healthcare, and to solving the world's great problems. It's ultimately an answer to the question: How can we learn more quickly what works, and discard what doesn't?
Collective intelligence. Think of how Wikipedia works, how Amazon harnesses user annotation on its site, the way photo-sharing sites like Flickr are bleeding out into other applications... We're entering an era in which software learns from its users and all of the users are connected.