I just received this email from Twelve South that the BookArc for iPad is now available. Looks like it can work with or without the Apple Case:
We are pleased to inform you that the Twelve South BookArc for iPad is in stock and available immediately at twelvesouth.com/products/bookarc_ipad. We have limited quantities available now on a first come – first serve basis. The product will be widely announced later this week but we wanted to give you the first opportunty to order your today.
Thank you so much for your patience and for signing up for this alert. We hope you enjoy your BookArc for iPad. Let us know if there is anything else we can assist you with by contacting us at email@example.com. To learn more about BookArc for iPad, click here. Visit our BookArc for iPad Gallery for additional pictures. Thanks again for your patience and support.
BookArc for iPad Inside Tip.
We have been testing several cases with the BookArc for iPad and one of our favorites is the popular Apple iPad Case. It works with BookArc for iPad by removing the silicone insert entirely for portrait or landscape oriented storage. Flip open the cover on the Apple iPad Case and set it in BookArc to view movies, pictures, and slideshows hands-free.