Yes, the July update to ATP Navigator Online will support iPads. All regulatory content is in html and works very nicly. We do recommend adding the Goodreader pdf app for better performance of the PDF based maintenance content. Although it functions, I would not consider a iPad the best choice for really large manuals (MM, IPC etc). I have a iPad and a Netbook and find the full funtion browser in the Netbook supports more of the advanced functions than the reduced browser fucctionality of the iPad browser.
There is a demo here: http://askbob.aero/content/hubconnect-app-ipad