I got approval for airport-data to be on our approved list, but who knows about other facilities if they even know about your site!
This answered my question, though made me more surprised. Thanks for getting our site approved, I am really honored.
Speaking of inbound traffic data, I have done some research on that before. We can get really time (well, kinda, with 10 minutes delay if I remember correctly) flight data from DOT, then we can provide many services using the data, such as real-time flight tracking (like flightaware), arrival and departure of all passenger airports, etc. The only issue remain unsolved is I can't afford a dedicated T1 from DOT's data center (located in MA) to our server (Toronto, ON) which is required to receive data.