どこのQ&Aサイトが一番か?

MITのTechnical Reviewで、Wade Roush氏がYahoo Answers、Amazon's AskvilleなどのQ&Aサイトを調査し、格付けを行っています。
http://www.technologyreview.com/InfoTech/17932/

1. Yahoo Answers (11 points)
2. Live QnA (7 points)
3. Askville (6 points)
4. AnswerBag (4 points)
5. Wondir (4 points)
6. Yedda Answers (4 points)

またこれを受けてHitwiseで、LeeAnn Prescott氏が、米国におけるQ&Aサイトのシェアの調査結果を出しています。
http://weblogs.hitwise.com/leeann-prescott/2006/12/yahoo_answers_captures_96_of_q.html

* Yahoo Answers with 96%
* Answerbag with 2%
* Windows Live QnA with 1%
* Wondir with 0.7%
* Askville with 0.11%
* Yedda with 0.02%

Thanks to; Search Engine Land
http://searchengineland.com/061228-091634.php

Yahoo Answers
http://answers.yahoo.com/
Answerbag
http://www.answerbag.com/
Windows Live QnA
http://qna.live.com/
Wondir
http://www.wondir.com/
Amazon Askville
http://askville.amazon.com/askville/Index.do#answers
Yedda
http://yedda.com/