Documentation for mod_python is on http://www.modpython.org/
Mod_python is going to be maintained on Github from here on. There is no plan for additional releases, the latest code is the master branch, which will be kept as stable as possible. For issues and questions please use Github.
If you can't read instructions:
$ ./configure
$ make
$ sudo make install
$ make testIf the above worked - read the tutorial in the documentation.