I also had 3 great interviews in NC and the regional told me to make sure I kept near my phone over the weekend and that he thought I would be a great fit. Still no news via phone or email, good or bad. I am thinking it's not going to work out, but holding out hope that something quirky is going on and I will hear something positive. The background checking post makes sense, hoping that's not the case and maybe there's a backload of work as they are getting close to the training start date. Also, giving 2 weeks is the right thing to do, but I have never been asked to stay on more than a couple of days at most to transition any loose ends and turn in company property.