Stackless Python has been ported to Python 2.4.2
The sprint at PyCon 2006 was a success and the result is that Stackless Python is now available for Python 2.4.2.
You can either obtain the source code from the SVN repository or download the precompiled windows binaries.
There is only one known issue, related to pickling a certain type of iterator. And this should be rarely encountered.
Stackless Python