Version 2 just came out and i love it.

Also worth a look in my opinion is Aptana Studio 3, which is basically Eclipse with optimized settings and installed plugins for web-development, Python (PyDev), rails, ...

One thing I installed on top was a mercurial plugin from the eclipse marketplace, otherwise it's pretty complete for my needs.

I am using Python+Aptana+Numpy+Scipy+Matplotlib for doing the programming of some physics research, and it's great.