OK well actually it might not be now. They (ESPN) have now scheduled a Indy race for noon and if it gets rained out MX will be on. Check out www.racerxill.com for the full story. Just another case of motocross getting the shaft.
As a huge cart fan as well as a mx fan, I can tell you that cart has been shafted by ABC/ESPN/ESPN2 many times as well. I was happy because I knew I would get to see something I wanted to watch, either mx or cart. Hopefully I'll catch the MX broadcast whenever it does get aired.