I use Airnav FS Live Traffic 3.( http://www.airnavsystems.com/fs/ ) it is a subscription based program that renews every 3 months.Every flight, delay, extra flight will show up live. You just start a program that downloads all north american flight data from their servers and it creates a traffic scenery file. AVSIM also did a review on it ( http://www.avsim.com/pages/0410/AirNavSystems/FSLive.htm ). this program put the airlines at the corroect gates in the real world and also in the air. i have gone on flightaware and checked airlines that were around me in the sim and in real life they were relatively close to my current position in the air.