The Lightning (or Venue Pro for T-Mobile) is a Windows Phone 7 portrait slider. It runs on a 1Ghz snapdragon processor and has a large (4.1") OLED display. It has a 5mp camera, 1Gb of internal memory and 8GB on a micro-SD card (which is non-user-replaceable, apparently), GPS, accelerometer, compass, FM radio and full flash support.
The lightning will be released in Q4 2010 for the T-Mobile 3G network. An LTE version will come in Q4 2011.
4.1" WVGA OLED