Looking for a list of services simlar to Google Answers.

This question has been asked before, in various forms. Here you'll
find two excellent and thoroughly researched answers:

http://www.answers.google.com/answers/threadview?id=71183

http://www.answers.google.com/answers/threadview?id=250464

Here are two additional answers that are, in my view, of high quality.
Although these questions were asked from the standpoint of a person
interested in becoming an Internet researcher, much of the information
may be of interest to you:

http://www.answers.google.com/answers/threadview?id=242246

http://www.answers.google.com/answers/threadview?id=252469

I doubt that I can improve upon the answers linked above, so I am
posting this as a free comment rather than as a paid answer.

Best wishes,
pinkfreud (Google Answers Researcher)