KnowledgeWeb is amazing! It's a project by James Burke, author of the famous Connections TV series (Also a book, and a series of articles in "Scientific American"). The goal of the project is "mapping the accomplishments of the past and the possibilities of the future". It will map virtually and visually the most important advances, technological developments, turning points, people and places in human history (and in its future too), connect them and make the final result explorable in an easy and fun way.
More about this at Future Wiki.
He also made documentaries ? Neat !
I remember reading his articles in Scientific American, we even had a "Connections" book. That was before internet times (for me, at least), but recently I was thinking of him - it'd be great if he was a wikipedian ! (heck, maybe he is, though I doubt it) Stuff in "COnnections" is the way I'd like wikipedia to be …
Anyway, knowledge web looks neat, I just wish it had more interplay with wikipedia … I'll have to dig into that, I like Burke
The article on KnowledgeWeb at Wikipedia notes the similarity and discusses the differences. The K-Web is welcoming volunteers, so there might be a number of interesting possibilities to create synergy between it and other projects including Wikipedia. I will certainly look deeper into K-Web too, I'd love to take part in it one way or another.
And his documentaries are very cool (you can get them all from eDonkey, just search for "bbc connections"). His presenting style is great, the budget was apparently high (historic reconstructions are some of the best I saw in a documentary, a lot of footage from all over the world) and, best of all, when we go via a connection to another invention sometimes you can't stop but think "OMFG, that was amazing!". It also helps to remember Civilization games, the connections in its technology trees are thought out as well. Clips from Connection, IMO, would work perfectly in Civilopedia entries for inventions.