The Saab is in DFW and LAX
Recently LGA and BOS have gone to newhires who have subsequently bid out of those domiciles. Prior to that, it seemed that those two were pretty senior. LAX is very senior on the jet, but junior on the prop. ORD is pretty junior on both CRJ and ERJ. DFW is somewhat senior on the ERJ (no new spots since last fall), but junior on the CRJ.
If you get a prop and want the jet, you are locked into the prop for 1 year before you can bid a jet.
Props get off of reserve faster than jets.
Bidding to a new domicile isn't hard, it just requires that there be a vacancy either from someone leaving/upgrading or a vacancy in the monthly system vacancy. I know of several instances where guys have bid out of their domicile while still in training...