I just interviewed with republic last week. There were 15 or so of us and from what I hear they run 3 interview sessions per week. I was shocked to see so many people there after reading what I have on these boards. None of us were former FO's at pinnacle or any other regional. Lesson here is there are a LOT of flight instructors out there with 1400 hours.
In case you were wondering I was offered the job and turned it down. They said they wanted to raise starting pay to $30/hr for FO's and up from there but the union wouldn't let them. In the next breath they said $1600 for 8 weeks of training ($800/mo) and shared hotel room. I'm pretty sure the union didn't keep them from giving us our own room in training.... Really turned me off.