able2know.org
akaqa.com
allexperts.com
answerbag.com
answers.com
answers.yahoo.com is probably the most popular Q&A site currently.
aolanswers.com
ask.fm
ask.metafilter.com
askville.amazon.com/Index.do
blurtit.com
fluther.com
formspring.me
justanswer.com
kgbanswers.com
linkedin.com/answers (talked about in lesson #82)
mahalo.com/answers/
querycat.com
quomon.com (tech...