Thanks for this series of articles. As a freelancer of almost 1 year myself, I found this very helpful and will help me in my career ahead. To answer your question about unsolicited work, yes I have gotten offers from strangers but not through StackOverflow but through Github. I have a couple of open source projects up there so that must be the reason. I get offers from LinkedIn constantly too but they are all for full-time, on site jobs.