Major League Soccer matches will primarily be shown on Versus (soon to be renamed NBC Sports Network) which already reaches double the households Fox Soccer Channel currently has access to. 41 matches per year will be broadcast on Versus, 4 on NBC.
ESPN will still show matches Nationally, as will Univision.
Fox Soccer's Major League Soccer broadcasts have always had an amateurish feel to me. Based on how Versus/NBC Sports promotes and the quality of their broadcasts of the National Hockey League and the Tour de France, this arrangement will be huge for Major League Soccer!