This is a really important topic to be aware of. In summary, the FAA is proposing a couple of things:
1. Reduction of the Class B airspace over PDK and other airports from 8,000 feet to 5,000 feet.
2. Implement a "Constant Descent Approach" (CDA) over Atlanta into HJIA.
The first will possibly do several things (again in summary):
1. Require planes taking off and landing at PDK to remain at a lower altitute for a longer period of time.
2. Delay flights taking off from PDK increasing idle time.
3. Increase the number of airplanes in a smaller amount of airspace.
The second will possibly increase the number of commercial airplanes flying a direct route over Chamblee, Doraville, Dunwoody, Brookhaven, etc. As well as allow them to descend and fly at altitudes of 5,000 - 10,000 feet.
FAA is making presentations on Monday, March 1st at 3:00, 5:00, and 7:00 at the Chamblee Civic Center.
There are many resources available, the best can be found at the Peachtree DeKalb Airport website (look for "Class B Airspace" in the lower right corner).
If you can make the meeting, please do. The FAA will accept comments until April 3, 2010.
Here is the AJC story
Stand Up DeKalb Comments
Presentation by PDK to the Dunwoody City Council
FAA Presentation - Preliminary