Google fights Wikipedia with Knol. You'll find signed, authorative articles, and people may suggest changes, but not change anything themselves, like in Wikipedia. Knol does not look too cool right now, but might end up being a killer encyclopedia in some years? I'll stick to my blogs, but you now have the chance to write an authorative article on Robert Wyatt or Canterbury rock!
Others want to beat Google (!!), and have developed Cuil. Here is what they say about themselves: "The Internet has grown exponentially in the last fifteen years but search engines have not kept up—until now. Cuil searches more pages on the Web than anyone else—three times as many as Google and ten times as many as Microsoft.
Rather than rely on superficial popularity metrics, Cuil searches for and ranks pages based on their content and relevance. When we find a page with your keywords, we stay on that page and analyze the rest of its content, its concepts, their inter-relationships and the page’s coherency."
Birth of the Cuil?