Could Microsoft's Silverlight soon be following in the footsteps of Adobe's Flash Player for mobile devices? That's still unconfirmed by Microsoft, but ZDNet's Mary-Jo Foley is reporting that she's heard from several sources who say that Silverlight 5 will be the last version of the rich media platform, and that it's not clear how long it will be supported after it's released later this month. What's more, another source tells Foley that the final version of Silverlight 5 itself might only work with Internet Explorer on Windows, a
