Equally smart, compact, and trendy is the Acer beTouch E140, a 12.8-millimeter thin Android 2.2 phone with a borderless 2.8-inch QVGA touchscreen display. It comes equipped with a Qualcomm 7227 processor, an updated JavaScript engine, high-speed WiFi/3G/Bluetooth connectivity, eye-popping Acer UI widgets, and all the flexibility of the open-source Android system. It also comes with …