Some sites, like linked in, allow you to say "I'm interested in being contacted about ..." with several options.
I've noticed a few people self promote themselves in the body of their answer. While I find nothing explicitly wrong with that, it might be advantageous to everyone if we had a few User Interested tags.
For example, a user could say, "I'm interested in being contacted about:" Contract Opportunities, Full Time Employment, etc.
This could be indicated with some sort of little badge under their name, and next to their icon.