ESPN appears to be heeding cable operators' frustrations with networks placing so much of their premium content on the Web for free. The sports programmer has recently started charging for two popular shows that had been available at no cost on ESPN.com. And it may restrict access to NBA, Major League Baseball and other attractive games that it streams gratis on broadband site ESPN360.com. Now, in order to view the duo on ESPN.com, a person must be what's called an ESPN Insider and pay a fee ($6.95 a month, $39.95 a year). ESPN is also looking at curtailing access to some of the live events it provides at no cost on ESPN360.com--where it offers a wealth of high-profile simulcasts of games seen on its networks.