Try this: in your /etc/apt/sources.list and then add
> deb http://peds-pc311.bsd.uchicago.edu binary/
> and do
>> sudo apt-get update sudo apt-get python-matplotlib-jdh
You might give these a try now -- I just updated the debs to
matplotlib-0.86.2cvs with numpy 0.9.2 support.
JDH