Hi!
I JS on Pinnnacle sometimes when GRB is full. They used to be called EAI, just changed their name. They still are NW Airlink, and mostly fly CRJs (ONLY CRJs?), but lately have a lot more flights from more hubs than before.
All of their pilots have been very friendly and accomodating. I do know that some JS aggreements before 9.11 have been changed between various carriers. If your agreements are post 9.11 there should be no problems.
Cliff
GRB