64-bit Python?

[Mike Coleman]

Has anyone looked at making Python 64-bit clean?

I was looking at trying to use the new mmap module to map in a large (>2G)
file, and the comments in the source note that the mmap regions are limited to
int-size (31 bits), primarily because Python objects are also limited to this
size.

Does anyone know if there's an inherent reason why it would be impossible or
difficult to make Python 64-bit clean (say as a compilation option)?

Mike