According to the information we have, since July, 24 Box.net had disabled WebDAV access for its Lite and Individual subscription plans.
Therefore, only those ReaddleDocs and OneDisk users, who has subscribed for Business and Enterprise plans, can use our products to access box.net storage from their iPhones at the moment.
We are communicating with box.net regarding this issue. More details will follow as things become more clear.