Would it be possible to add a search option which will tell you if employers are looking at the careers site in your area? I wouldn't expect to see the name of which employers are looking, but I think it would help, when you are looking for a job, if anyone in your area is actually even paying to see resumes.
Where I live, I'm not certain how many people have even heard of Stack Overflow, let alone have realized the potential about finding programmers on it. I don't live in a small town, I just don't think the market penetration for it has really happened here (don't know why, you may insert jokes about the quality of programmers at this point in time). When I start looking for a new place of "opportunity", it'd be nice to know if I don't get any response, because no one has figured to look at SO, or just because I'm lame (not arguing the latter could definitely be possible).