It would be nice to build a freenet-like system out of modular parts. I think Tribble has the beginnings of something like this. http://www.tribler.org/ It overlays a "gossip network" on top of the bittorent protocol.

I'd see the ideal uncensorable Internet as consisting of fall-backs from the ordinary protocols and processes. If the user can't find the DNS of a site, they look using an alternative dns system. If they can't find the IP, they use something like Tribble to find the thing.

This would be done as a browser plugin.

Another piece would be to have particular authors embed their public keys into whatever text they write. A user could search with Tribble or whatever for more works by that author out of outside of ordinary web search. Such a system would verify authorship and "source" without the need for a centralized certificating authority.