How to build the next Internet: make it p2p.
The current Internet is mired by its history of monolithic, server-centric computing centers. Most content now is generated by the users and shared in a peer-to-peer fashion. The DNS system isn't equipped to handle this.
Let's upturn the top three layers of the legacy OSI model to put the Session layer at the top where users are switching gears and locations often, make a new, 3d Presentation layer utilizing a unified data model, and rename the Application layer the content-centric layer which will replace DNS and ultimately the OS. Hellyeah.
All this is being done at pangaia.sourceforge.net. It advances the state of the art in computer science and data visualization (as well as being totally rad) and is looking for people to help code a prototype.
A working paper version has been made as proof-of-concept. It's shows how with a few simple rules it will create a very complex, self-organizing system of social information.