I notice there's also "How to Backpack: starting from scratch", maybe they're trying to compete with E-How/Wiki-How too?
Google has taken the wraps off Knol, its expert-written challenger to Wikipedia. Wired has an in-depth look. Knol's distinctions from Wikipedia are that authors
are identified by their real names (and verified), and that they can share in ad revenue if they choose to. The service initially features a lot of medical articles, which is
interesting considering that Medipedia also launched today. This medical wiki is backed
by Harvard's and Stanford's medical schools.