Former Facebook CTO and Quora co-founder Adam D’Angelo, talking to Om Malik at GigaOM:

The real reward is in the response to your answer and the fact that millions can read it. You already see more people giving and sharing knowledge for free. Lawyers and other professionals are using Quora to build their reputation and build their bonafides.

I haven’t seen many lawyers on Quora yet, but I’ll start looking for them to see exactly what D’Angelo means . I wonder if some use cases implicate ethics rules.