Depends on what you mean by IDE. There is PythonWIn which is what I use on windows and Idle which is what I use on Linux, but neither of them is fully featured if you are looking for things like project and CVS integration. If you just want a good editor for Python, I think they are both excellent and they come with most Python distributions.
[red]"... isn't sanity really just a one trick pony anyway?! I mean, all you get is one trick, rational thinking, but when you are good and crazy, oooh, oooh, oooh, the sky is the limit!" - The Tick[/red]