I suspect many folks have an "Iditarod Insider" subscription and will be using the GPS tracker to follow the race.
If you don't and you are interested in "diving deep", it's highly, highly recommended. Go to the 'Insider' tab at the main menu of the Iditarod.com website, and choose 'Be an Insider". For $33.95 you get the online, interactive GPS tracker shown below and a lot of great videos and commentary on the race.
If you find yourself waking up in the middle of the night and wondering how Trent is doing,... just roll out of bed, fire up your tracker, and you will know.