Something that’s totally crossed my radar until today is WikiAnswers, a service by Answers.com that is seeking to build a complete Q&A knowledge database, or in other words, a Wikipedia for questions and answers. And it just crossed its millionth question today.
The idea in itself is in-genius and gives notable Q&A services Yahoo! Answers and Live QnA a run for their existence: instead of multiple “incomplete” answers to questions and a chosen “winner” out of the bunch, users instead work together — like an ordinary Wiki — to produce complete, edited answer(s). Anyone can ask a question and contribute to answers. Here are a few examples.
The service has so far proved to be a popular section of the otherwise Wikipedia-piggybacker Answers.com, and adds brilliantly to their name and model. And in terms of pure traffic, Comscore reports four million uniques in the U.S. with a 317% growth, making it the second fastest growing site of the top 1500.
Allen Stern, who’s writeup on the service is what alerted me to it in the first place, comments on the brilliance of a simple marketing idea, and I’d have to agree. He also notes that the top users contribute a large amount of effort to the site, and he’s not lying — user Neila222, the top editor of the site as of today, has made 104564 contributions to date — talk about free time!
Looking at the way things have been going for the service, it may just as well end up replacing the original Answers.com site in ample time. And I think with the kind of Google Ads that seem to splatter the service, it can afford to, too. 
