The way the agreement is written it expressly forbids interpreters. Additionally, corona is mostly compiled (although parts are still in an intermediate format see 16:30 in http://www.mobileorchard.com/corona-easy-to-implement-high-p...)

>MonoTouch is delivered as a static compiler that turns .NET executables and libraries into native applications. There is no JIT or interpreter shipped with your application, only native code.