I wish them a LOT of luck. Compiling core/console stuff is one thing, but adapting the Widgets so they feel native is no easy task (just look at the effort Qt had with Maemo, and that's *in-house*, with help from Qt folks). Recompile-level compatibility is very unlikely (probably near-impossible), the UI paradigm of the iPhone is very different compared to other platforms, i.e. the UI layer of your app will likely have to be redone at least in certain parts.