There is some talk about waiting for Python JIT technology to catch up
to RPython speed, and that writing RPython code is a short term hack.
But what about when memory counts, like on a smartphone, do we want
the overhead of an interpreter and JIT? Also Apple disallows
interpreters.
Last year Phil Hassey used TinyPy to convert his RPython code into C++
and compile it with XCode, the App made it onto the AppStore.
http://www.philhassey.com/blog/2009/12/23/elephants-is-free-on-the-app-store/