Wow Wow Wow! Engadget has a leak of the Dell Lightning Windows Phone 7!

The renders on these slides look slick as hell, but they’re no match for the spec sheet, which looks even better: 1GHz QSD8250 Snapdragon processor, WVGA 4.1-inch OLED display, AT&T and T-Mobile 3G, five megapixel autofocus camera, 1GB of flash with 512MB RAM plus 8GB of storage on a MicroSD card (non-user-replaceable, we’re assuming), GPS, accelerometer, compass, FM radio, and full Flash support including video playback. Release date is pegged at Q4, so this is obviously a WP7 launch device, but here’s the real kicker — other slides in the deck indicate this thing is getting an upgrade to LTE in Q4 of 2011.