The iPad version we are developing is Landscape only. Having it in Portrait on the iPad just seems to be a waste. I suppose if we eventually find a good design in the future that may change.
I was hoping the game would run in landscape, so it's another thumbs up from me.
I really enjoy portrait games on the iPad. It's how I hold the device most of the time. Don't consider it a waste. Look at Edge and Edge Extended. A great game on the iPad no matter which way you hold the device.