First of all I had a hard time getting the python svn bindings to compile with the patch. I think it's mostly related to the fact that I was using VS 2005 to compile...
For example the patch file for svn 1.4.3 fails to export one function in swigutil_py.h causing linking to fail...
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SVN_SWIG_SWIGUTIL_EXPORT
int svn_swig_py_pool_set_owned_ref(PyObject *proxy, PyObject *oldRef, PyObject *newRef);
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So if anyone is interested in getting a compiled version I can try to upload that somewhere...
After that I tried to run the unit test "bzr selftest svn" but it was failing with a lots of errors.
I then fixed create_repository (it was creating a file://c:/ instead of file:///c:/) and various tests went thru but still errors.
I finally came back to the project page to realize that Windows support is in the Future Enhancements section.... :S
status fixcommitted
Fixed now, tested by KevinLight.