Interviewer said there would definitely be follow up within 2 weeks and then I heard nothing (and it's been several weeks.) I'm not sure they really know what they are looking for. They reposted their add, so they are now trying to identify more candidates. I work in Human Resources and understand the need to find the perfect fit, but don't leave the ones who invested time into you hanging. That is unprofessional. This is a candidate market (and certainly you realize this) and negative words spread fast. Even if you returned a call now, I would pass based in how you treat candidates.