This was the spectacular scene at Launch Pad 39A earlier this evening:

According to various Twitter feeds and such, Endeavour was unharmed by the lightning storm; I guess Mother Nature was just giving her a big sendoff for her final voyage. Now the Rotating Service Structure, the big clamshell gantry that encloses the shuttles while they sit on the pad, has been retracted and, as of this writing, everything is on track for a scheduled liftoff tomorrow afternoon at 3:47 EST.