We're sorry, but the Palm Pixi's rendition of Need for Speed no longer impresses us -- we've just seen John Carmack show off Rage for iPhone. While of course it looks nothing like the PC graphical monstrosity that swept the E3 Games Critics Awards, it's safe to say the 60 frame-per-second tech demo at QuakeCon 2010 shoves the cell phone gaming envelope through a Juggernaut-class brick wall. Where Carmack originally called the iPhone "more powerful than a Nintendo DS and PSP combined," the i