Are there plans to develop a smart phone app for the iphone? Without it, I suspect your controller is going to have limited success. Programming, running stations, etc using the web browser on my iphone is very limited at best. I suggest you research the app available for the IrrigationCaddy. It is very easy to use on a smart phone and runs circles around this interface. At this point, I am very disappointed with this controller.
Also I suggest you forgo the graphical UI since it is unlikely to closely match anyone's actual yard. Instead, might I recommend a simple list of zones and programs. The way it is now, I find myself accidentally moving the sprinkler icons all over the place as I am forced to scroll around the screen on my iphone. Is there a reason the icons can't be set to stay put once placed?