Thanks. I did look at that page recently, and felt Numpy support was still experimental. But I'll give it a fair try.

What would motivate me would be that Pypy supports the packages I need for my day job, including Pandas, Scipy, and Scikit-learn. Do you know if there are plans to have these on top of Pypy?

Does PyPy work with Python 3?

Python 3 has been out for 7 years and I refuse to use anything that doesn't work in Python 3, it's just ridiculous to keep building stuff for Python 2, it's hindering the language and keeping it back in the past.

Note also jitpy for those times when they're not:

http://jitpy.readthedocs.org/en/latest/