NumPy installer can\'t find python path in the registry.
Cannot install Python version 2.6 required, which was not found in the registry.
Guido van Rossum (creator of Python) says he is keen to see NumPy work in Python 3.x, because it would enable many dependent libraries to move to 3.x.
Update 2010-08-05: NumPy version 1.5 supports Python 3.x, and SciPy will soon. NumPy 1.5 beta is available for download now.
Update 2012-05-31: SciPy 0.10.0 added support for Python 3.1 in November 2011.