http://www.liveadvice.com
2. tutor.com
http://www.tutor.com
3. Abuzz.com
http://www.abuzz.com
4. Keen.com
http://www.keen.com
5. AskMe.com
http://www.askme.com
6. exp.com
http://www.exp.com
7. experts exchange
http://www.experts-exchange.com
8. AskAnything.com
http://www.askanything.com
9. Frenzi.com
http://www.frenzi.com
10. ExpertCentral
http://www.expertcentral.com