It's been nearly two years since we last reviewed a T-Mobile Sidekick, and it would be a vast understatement to say things have changed. Then, they were designed by Danger and manufactured by Sharp, and were the messaging phone of choice. Today, following fiasco and failure, the Sidekick empire is in ruins. But good ideas and their originators live on, and several of Danger's brightest wound up in Mountain View, California. Danger's Andy Rubin founded Android, design director Mattias Duarte built Honeycomb (after helping craft the Helio Ocean and webOS for Palm) and now, the Sidekick itself has joined its founders in the house that Google built. In many ways, the Sidekick 4G is a return to form, but in an ecosystem filled with similar Android devices, can it stand out from the crowd? Review after the break...