Latest update of new and returning cities beginning in July....
CRJ9: new, HLN, SUX, GEG, BZN, YHZ, OKC (last two were former Avro cities)
returning, DLH, GRR, SFO
CRJ2: new, MOT
returning, BIS, IND
SF34: new, CHA, TUP, MSL (new for Delta out of ATL)
returning, CID, FSM, FSD, SBN

Enjoy.