Not being an EV Project member, I hadn't heard that there were special applications. If they exist, I'd like to hear more about them.
If you mean the regular Nissan/LEAF functions, Carwings and Bluetooth, my droid X works just fine. I'd be surprised if any smartphone didn't work. All of the Carwings and Nissan Owner's Portal stuff is web-based, and seems to be aware of the limited screen size of smartphones.