FlightAware - Airline Flight Tracking

I was looking for a way to track Lindsey's flight yesterday when she went home to Texas (snif snif) and I found this site. The picture above is all the current flights in and around the US. I found it a fascinating graphic. The site is called FlightAware, and if you know the airline and flight number it will give you information and stats on any current flight, and also any weather problems that may be out there.