This is all rumor and not insider information, but...
Delta is hiring... a lot. Rumor was the training department wanted a break, but they didn't get it due to the demand. There are pilot classes of around 24 people each starting on Nov 12, and one on Dec 3rd. Starting in 2008, there will be 2 classes a month of 30-35 and going to continue for at least 6 months, maybe longer.
Also, DAL did the last Air Inc conference in D.C., but wasn't happy with the service that Air Inc provided. It can be uncomfortable for a pilot who works for other companies that are present (ie jetBlue, Airtran), to meet and greet with DAL at AirInc. (BTW, there was 1 jetBlue and 1 Airtran pilot in my new hire class.)
DAL is considering holding it's own job fair with some of the other majors to avoid these problems.
These are all rumors, but they sure are good ones! Bottom line, get your application in.