Having done some work with Morgan Marat's wonderful interface components for embedding Python in Delphi, and although not implementing yet, having done an extensive read of BoostPython's library for interfacing Python with C++, it seems that Jython has a wonderful advantage when it comes to passing data structures back and forth between Java and Jython, and importing foreign (Java) libraries.  I was quite amazed at how easily I could expose Java data structures to my embedded Jython intepreter, and vice-a-versa.  Just a happy note.