Well, Sony has pretty much realized that there's no reason to drop the new price of a PS2 when there are still plenty of people out there paying $150 for it without too much of an issue. It also doesn't hurt that, hey, we're at the holiday season. Steady sales at $150 a pop? Nah, maybe they'll lower the price when the sales start to really dwindle. Besides, best to make all that they can at the moment!
And with the XBox...who knows? I can't fathom why there isn't a drop but, hey, if there's no drop, there's no drop. I'm just waiting for titles, really. Come on, Xyanide...