Oppo, beloved maker of a variety of electronics rarely released outside of China, is jumping into the smartphone business with an Android-powered slider called the Oppo X903. Take the following specs with a pinch of salt, but the device is believed to have a 1GHz Qualcomm Snapdragon MSM8255 CPU and comes with an eight megapixel camera and a 3.97-inch WVGA IPS screen. So far, so normal -- what's not normal is the ad campaign for the phone, in which a bemused Leonardo DiCaprio stares glumly out of a moving train as a woman writes "find me" in condensation on a perfectly clean window. That's right after