and other readers sent in word that Google has taken the wraps off Knol, its expert-written challenger to Wikipedia
. (We discussed Knol
when it was announced last year.) 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.