According to articles on web Apple will not approve Apps that have code that is not originally developed in Objective C, C or C++.

Found on the Web:

3.3.1 Applications may only use Documented APIs in the manner prescribed by Apple and must not use or call any private APIs. Applications must be originally written in Objective-C, C, C++, or JavaScript as executed by the iPhone OS WebKit engine, and only code written in C, C++, and Objective-C may compile and directly link against the Documented APIs (e.g., Applications that link to Documented APIs through an intermediary translation or compatibility layer or tool are prohibited).

Can we build a list of things developer use that will and won't be allowed under these possible new rules?

We can use:

C, C++, Objective C

We can't use: Flash, Monotouch C#, Pascal, Fortran, Perl, Python, Lex, Yacc, Unity (games engine), Java

What others?