AndroidGuys added their thoughts on the possible specs of the device:
We're waiting to hear what the specs are but we expect it's not going to be a huge jump from the original device. We'd love to see SuperAMOLED in that screen, but we're not expecting it. The device has a few subtle changes to the design, juggling the keys around slightly and adding a search button to the display.
As for specific rumors, Android 2.1 with Touchwiz 3.0 and obviously a QWERTY keyboard.
Image from AndroidGuys