pyfilesystem is great!
My only suggestion would be to improve the search optimization for pypi.
It's the ~10th result for https://pypi.python.org/pypi?%3Aaction=search&term=pyfilesys... and a page down on https://pypi.python.org/pypi?%3Aaction=search&term=fs&submit...
It's really not clear what it's called since the package name is 'fs' but the project is 'pyfilesystem'.