I've been working with Carsten on a free iPhone app for Org. We are still working out some of the details, but so far we have it running on the phone in a fairly usable state. It needs some polish, but it is very nice to see my Org data easily accessible on a mobile device with offline access. To be clear, we aren't trying to run Emacs on the device. The goal is to view Org files and agendas as well as capture new notes.