BUSINESS 2.0 -- Apr 18 -- Data from Nielsen//NetRatings, released today, shows that Yahoo Answers is by far Yahoo's fastest growing channel; it went from an average monthly unique audience of 2.3 million last winter to 15.7 million this winter. Facebook has more than 19 million monthly unique users in a system that's more closed than Yahoo Answers; you have to be a member to poke around in Facebook, but Yahoo Answers is browseable. Amazon's four-month-old Askville site has a similar bent, and it gets a lot of questions that seem to be from the young parent demographic - questions about what kind of birthday cake to get for a 1st birthday party, how much work is right for a kindergartener, and what the best cookware brands are. Yahoo is collecting a staggering amount of data about user questions and interests. FULL ARTICLE @ BUSINESS 2.0