The Motorola Atrix is currently the fastest Android phone on the market, and it's one of the most innovative thanks to a line of super-accessories like the Lapdock and HD Multimedia dock that turn it into a laptop or desktop computer of sorts. It's all powered by Webtop Linux which runs smoothly on the dual core 1GHz Tegra 2 CPU. The Atrix also has the highest resolution among Android phones with a 4", 960 x 540 pixel display. It runs on Android OS 2.2 Froyo with Motoblur software and it has 4G HSPA+.
The Motorola Atrix is available now on AT&T for $199 with contract and $499 without contract. The Lapdock and HD Multimedia dock is out too, but they'll set you back a fair piece of change.