Landscape! But that said, I've just spent a lot of time designing an iPad app I'm working on so it works in both - it really takes a lot more time than you init

Landscape! But that said, I've just spent a lot of time designing an iPad app I'm working on so it works in both - it really takes a lot more time than you initially think! I ended up using a combination of autoresizing masks and resizing some UIView containers in code when it rotates. I released a landscape-only app for the HP Touchpad (same form factor as an iPad), and a few of the user comments were that they wanted a portrait version, so people do notice these things if they like the app.