August 27 - 2:30pm EDT   Alongside its Xplod updates, Sony today also overhauled its NAV-U mapping devices with a handful of key updates. A new photo viewer lets owners of Sony's cameras swap Memory Sticks to view their JPEG images from the larger 4.8-inch screen. Every GPS unit also a better search, Sony claims: a faster search routine is also mixed with a Quick Link shortcut feature that automatically searches for a favorite restaurant chain or similar point. [full story]