Building twine

http://www.wxpython.org/download.php

http://sourceforge.net/projects/py2exe/

http://stackoverflow.com/questions/4676433/solving-dll-load-failed-1-is-not-a-valid-win32-application-for-pygame

Building on Mac OS X

In theory the process should be as follows:

cd twine/
python ./buildapp.py py2app`

At present this does not work correctly due to a mismatch between the versions of python and wxPython included with mac os x. In theory this could be resolved by using a newer version of wxPython.