Live Earth Concerts and Country Music

Live Earth--a continuous nine concert event taking place on seven different continents around the world on 7/7/07 is beginning to take shape. Performers are being announced for each of the venues. I saw a list of scheduled performers, but I did not see any country acts right off. Why is this? Country music is listened to by millions of Americans and people all over the world love it (Japan, Germany, England, and Australia have always had large numbers of country fans).

I seem to remember that Tim McGraw was part of the concerts held a couple of years ago for Live 8. I think he performed in Italy. Well, does anyone know if any country stars will be part of this upcoming Live Earth?