I'm stuck at this point with ViewVC
ImportError: No module named svn
I can't find prebuilt Python 2.6 bindings for Subversion, and I can't seem to locate the source for them either!
The bindings ship as part of Subversion -- get the source to subversion and you have them (almost certainly SWIG bindings, but I haven't looked). I've been using Python 2.6 for a while and although I'm now on Subversion 1.6.x, I would have had 1.5.x installed before.
Finding them is going to be dependent upon the OS, packaging system, etc; none of which are mentioned.
Did you install from source? Did you install a package? Does your OS's packaging system split off the interpreted-language bindings from the package itself? Eg, on FreeBSD you would have a py26-subversion port/package in /usr/ports/devel/py-subversion. On Debian/Ubuntu, you're looking for the "python-subversion" package.