I created the thread below to detail our experiences.
http://www.vehicross.info/forums/showthread.php?t=7932
I have the Thule Expedition 696 the larger of the two versions available. It installs with no modification. You just need to remove the rubber trim on the top of the roof racks. Or trim them around the mounting "T-Shaped" mounting bolts that Thule gives you that slide in the top channel of the roof racks.
Down side is that it does not have mounting brackets for load bars so that you can attach bike, ski, and other racks like the Thule Playpen had. But I'm going to fab my own.