At the time of this writing, there are six additional panels that can be downloaded to the X1: Cool Hunting, Dashwire, FaceBook, Slideshow, Spb Mobile Shell, and Windows Live. If you don't find any of these appealing and/or you don't want to wait for more to become available, then go ahead and make your own! Developers can use the official SDK, while others can hone their skills with the unofficial panel creator