If you have a naked roof (no factory rack parts), there is nothing available to attach to it at the moment. They may be working on some Q-clips to fit the door frames, but sometimes it takes a while to get around to it.
If you have the factory siderails you can get the Railgrabs and some crossbars to attach stuff to.
If you have factory crossbars, you can mount some stuff directly to it.
Their customer service is usually pretty good, try giving them a call and discussing it: "3) Call Consumer Service at 888-925-4621, Option 2, from 7am-5pm Pacific Time M-F."