First, thanks for putting this together. Glad to see Delta's effort here. A couple of other suggestions for future versions:

- Love the ability to see my place on the upgrade list. However, once upgraded, can the app automatically update my boarding pass with the new seat? It would be nice not to have to wait for the ticket to come out of the machine.
- Don't automatically log out after a fixed period of time. Similarly, better offline functionality would be nice as there are many airports where cell phone coverage is limited around the gate area. Last week (still using v1.4, so this may be a moot point), I was scrambling at security trying to get a cell phone signal -- I checked in at the office before driving to the airport, but was automatically logged out by the time I got to the airport. Had to start from the beginning (log in using Skymiles number) to access my boarding pass.