It looks like the http://matplotlib.svn.sourceforge.net/viewvc/matplotlib/branches/py3k/ in dead.
The last commit was 8months ago.
Numpy is ok with python3.1, scipy is ok, nose is ok, ipython is usable.
Ubuntu already provides python-tk for python3.x
It would be nice to port matplotlib to python3.
Is there a plan? another svn/git branch?