Since this sort of thing is what drives hiring ... here's the 2 December Advanced Entitlement posting of openings:

Format:
City Aircraft A(Captain) Openings

DTW 73N A 7

ATL 320 A 20
DTW 320 A 15
MSP 320 A 3
NYC 320 A 5
SLC 320 A 2

ATL 320 B 15

ATL M88 A 30
NYC M88 A 5

ATL M88 B 40
NYC M88 B 20

Of course, these things do not happen independent of staffing on other jets. As FO's upgrade it makes more FO openings. We expect continued movement to the 737 fleet and consider it likely that 757/767 pilots will be backfilled until the summer of 2014. More 717 pilots will be added in the spring after the current IOE backlog is caught up. After peak summer flying they probably will not continue to backfill the 757/767/ER (category described this way for the non Delta folks).