In October, to commemorate the one-year anniversary of the launch of the G1 (the world's first phone running Google's now-ubiquitous smartphone operating system), FierceWireless produced an Android guide. Since then, the Android platform has exploded with supporting handset vendors and carriers. And today, analysts agree the evolution of the platform shows no signs of slowing. Thus, this guide--like the last one--looks at the major Android devices released (with prices) for the U.S. market, with an eye toward their pros, cons and market impact. Special feature