What IDE support python 3.0.1 ?

[mousemeat]

Use eclipse with the pydev module.  I use python(x,y) which is a big
bundle of most of the python stuff you could possibly want (including
scientific stuff, but its not mandatory to use it) configured to work
together.  It uses python 2.5.

You can have the best of both worlds.  Search for 'from __future__
import'  to see how to get 3.0 features into 2.x, minimizing the
eventual upgrade hassles.