Dapp HD will be an iPad version of Dapp. Specifically, it will be targeted at quickly developing iPad mockups and exporting them to PDF and code.
Mid June is a fairly aggressive target, so we will keep you updated on our progress.
Right now we are working directly with the iPad simulator, with the iPad currently on Pre-Order. We ordered through the developer portal, so fingers crossed that Apple gives us preference and that we can receive one on the release date of May 28.To your app success!,
P.S. Technology is only a small part of your app success. There is the business, sales and marketing that you need to think of too :). Which is why I also provide a bunch of free education on how to succeed on the App Store - http://kerofrog.com :).