Flight Training:

East Coast Aero Club (Flight School)
Executive Flyers Aviation (Flight School)
Gleim Aviation (Study Materials/Publications)
AOPA Online Courses
FAA Written Exam Practice Questions

Informational:

Aviation Weather (Always get a briefing!)
AOPA (Aircraft Owners and Pilots Association)
AirNav.com (Aiport/Facility Information)

Just For Fun:

Airliners.net (Aviation Photography)
FlightLevel350.com (Aviation Videos)
AviationExplorer.net