Filed under: Portable AudioWell, that makes three -- Sony and XM announced today that the two companies have reached a settlement in the Pioneer XM + MP3 case. As you'd expect, terms of the deal are super-secret, but we hear XM tells that to all the multinational record conglomerates it gets in bed with. Anyway, with Warner, Universal, and Sony all lined up, all XM has to do is woo EM