numerix on win32

(2) I could just build a numarray version of the matplotlob

    > installer with each release. That would offload the work
    > from you and would keep the matplotlib code cleaner.

If you want to do that I have no objections - I like this better than
maintaining both in a single build. I think we need to make the
matplotlib code work with either build (eg using the nx.Type scheme
you proposed) so that if the user switches their numerix setting with
a given build everything still works. But if there is interest in a
numarray build for win32, I see no reason why not. We should probably
be careful to coordinate so that the two releases are as similar as
possible, with the only difference being the default numerix setting
in the rc file.