Stack Overflow, Super User, and Server Fault have been growing like crazy - and in my very humble opinion, they have become some of the best sites to ask technology related questions and get prompt, germane, and often correct answers.
In fact, there is a large body of quasi-professional answerers on each of these sites who almost make a profession of responding to peoples' posts. I suspect that ego, visibility, gratification, and the reputation/badge system play a significant role in that. Which, of course is good for everyone.
SO also has features like the CV system and flair that offer opportunities for developers and system administrators to promote themselves and their expertise online.
My question is: in addition to CV and flair, what are some ways of leveraging your reputation or exposure on SO/SU/SF to promote your career? Actual success stories would be interesting as well.