Here is an Eagle library with TQFP-100 Xmega128A1 device definition. I am currently using this on a prototype development board. I have verified it multiple times in Eagle. I have not physically tested 100 percent of the pins on the dev board yet, but very close now. I can say the land patterns soldered very easy with the drag method. I don't know yet if they are suitable for production on pick and place / reflow. I should know how that works on rev2 very soon though..
Although I am 99 percent sure this is correct, please double check before you fab something and blame me for problems ;)