Now this is something I can talk about, because that's where I live!
Let me paint you a picture of the overall beverage scene.
Northern Delaware is Philadelphia Coke, PBG-Wilmington, Canada Dry New Castle, and Superior Beverages.
Superior has Crush, Hires, Vernors, Jolt, and so on. Canada Dry has the C-D flavors (in addition to the normal DPSU stuff): Island Lime, Black Cherry, Wild Cherry, Vanilla Creme, and Pineapple. Philadelphia Coke is a Dr Pepper bottler. Pepsi is Pepsi, nothing exciting there.
In the southern part of the state, Pepsi is Pepsi Delmarva (indie), CCE Mid-Atlantic, Canada Dry New Castle (and I believe they have a Salisbury, MD office as well).
There was a 4th tier, but it disappeared.
Pepsi Delmarva has a lot of the DPSU stuff, so Canada Dry is limited on what they carry. CCE is CCE, nothing too out of the ordinary, though they do have the 24oz 6pks if you haven't seen them yet.