I've been watching the Amgen Tour of California on TourTracker. While there have been some bugs with this complex Flash application overall the experience has been great. Yesterday my friends were in Santa Cruz waiting to see the race pass by and I was alerting them with status via SMS. I felt like I was Chloe running "command central" at 24. I even saw my friends in the live video as the race whizzed by them.
Below is a screen shot of the application which features live video and live telemetry including time, distance, speed and grade and well as GPS tracking in map and profile views. Very cool.