Ask YC: What is your favorite IDE?

Hi YC hackers, I was just curious as to what your favorite IDEs are?

I was at the CommunityOne/JavaOne conference today and everybody seems to be using NetBeans (Sun product, duh.); and the consensus seems to be that NetBeans is actually very good for Java, Ruby, C/C++.

I was just curious as to what people are using for Python, Perl, PHP... and Ruby.

Thanks.