Personally, I'm not too excited about PyPy, because it has little promise of speeding up the two typical use cases for Python in the kind of scientific code I c

Personally, I'm not too excited about PyPy, because it has little promise of speeding up the two typical use cases for Python in the kind of scientific code I care about: 1. Python is used to setup/glue together code that is written in a compiled langugage. 2. Someone writes a code by starting out writing everything in Python, then profiling and identifying the slow parts, and then writing these in a compiled language. Edit: example of 1): HOOMD-blue, example of 2): PyClaw.