Hi,

While working on IPython, I've patched simplegeneric to work with Python 3. It didn't require any major changes. The diff is here if you want to incorporate it:

https://github.com/takluyver/ipython/commit/34f06125b2f989f0d096f57642a2a0196c98bb1a

Our installation process for Python 3 runs all the code through 2to3, but that doesn't actually make any changes to simplegeneric, so with this patch, it should be directly usable in Python 3.

Thanks,
Thomas