Whoa. We've all been wondering if and when Dell would ever legitimately get back into the smartphone game -- and we've been wondering if we'd ever see a portrait QWERTY phone ever again. Looks like both questions might have been answered in this leak Engadget scored. The Dell Lightning has a 4.1-inch OLED display as a vertical slider, powered by the (now) usual 1GHz Qualcomm QSD 8250 Snapdragon processor. There's also a 5MP camera, 1GB of ROM/512MB of RAM with another 8GB of onboard storage, GPS, accelerometer, compass, FM radio, full Flash video playback, and it'll be GSM, to boot. Oh, and if that's not enough, it might well be upgradable to LTE sometime in 2011. Welcome back, Dell. [Engadget]