Tim Berners-Lee, the inventor of the world wide web, recently spoke at the Web 2.0 Summit. CNET was there, and provides a brief overview of some of the things Berners-Lee talked about. Here's a snip:
If you want it everywhere, give it away. The Twitter founders must have heard this message before they built their product. When asked why Berners-Lee never thought about charging for the Web, the answer was practical and capitalistic. "Because we wanted it everywhere," He said. "We wanted an URL for every page." And he got it. Ubiquity would not have been possible with competing, paid hypertext systems.