For the Nascar races covered on TNT, you can see a live stream at TNT's website. I've been doing that for the past couple weeks. It's a nice setup they've got there.
Digger has ruined FOX. I like coverage FOX has, but I like TNT's commentators better, with the exception of Kyle Petty. He thinks he knows everything, but knows nothing...
For anyone who likes Oval racin you should watch the Kyoto 500 race on lfs today possibly the best 30 drivers on the grid with a 270lap race which is 500 miles just like Indy.
This will have live commentry with instant Replays as well which is a LFS first.