Called Pinnacle today. They claim that they may be hiring around March or so. Mins are 1200/200 or with a CRJ transition course lower by a bunch.
They are getting ready for some expansion, if you look on WMU job website, Pinnacle is ramping up for something big. Comair has been telling folks not to expect a call back, so I hope this keeps some options open. At least the upgrade is short.