Hopefully you all check out supercrossonline.com, and subscribe to their email updates, but if you don't then you may like to know that this year, they will be providing 3 hour live streams of practice and qualifying from each supercross event starting 2pm local race time.
http://www.supercrossonline.com/supercrosslive/
I'm really excited for this season! :D Hopefully everyone stays healthy and we get some good racing. It looks like most competetive field we've seen in a long long time.
I would love to see the race live, but I think I have to wait for youtube if I can't find a stream :(