Hot on the heels of Mio's introduction of its C523 V2 motorcycle-centric navigator comes good news for American bikers. Garmin's zūmo 660, which was originally announced at CES with a monstrous $800 price tag, is apparently set to ship before the end of this month. Aside from the widescreen design, advanced Junction and 3D building views, Bluetooth connectivity, large-format keyboard, the device also includes a 4.3-inch sunlight-readable panel, ruggedized and waterproof chassis and a built-in feature that hunts down other obnoxiously loud exhaust pipes. Yeah, we're