High-speed browsing on the go just got a little better with AT&T and Option’s launch of the new USBConnect Quicksilver. Sporting full High Speed Packet Access speeds (where available, of course), the USBConnect Quicksilver is the first USB mobile broadband device worldwide to use the Icera Livanto chipset. This new device weighs just 1.2 ounces, yet packs the ability to browse the Web at high speeds worldwide…AT&T has the nation’s fastest 3G network, delivering LaptopConnect customers typical downlink