I currently use Nimblekit to program most of my iphone/ipad apps and I have been playing around with Corona trying to recreate the apps in it.
I have two big hurdles beyond learning more LUA at this point.
My apps have "Push Notifications" from UrbanAirship enabled and I don't see that it is supported yet in Corona.
The other big one is Epub/PDF reader. My apps come with tableview lists of large ebooks that either load in a custom objective-c PDF reader or call iBooks to open them. These are not like short comic books these are 400-600 page Bar Exam study guides.
Any way to replicate this in Corona?