Mark Harrison, from Pixar Animation Studios, recently announced the first release of "OraPig", which creates Python interfaces for PL/SQL packages. The documentation is a good place to get an overview: http://www.markharrison.net/orapig/The project itself is hosted at http://code.google.com/p/orapig/
The cx_Oracle 4.3.3 extension module for Python was released on Tuesday. It is available on Sourceforge. Source and RPMs for various versions of Python and Oracle are available. This is the first release that is available with 11g support (though, of course, Oracle clients and databases of different releases can connect to each other).
On his blog tahitiviews.blogspot.com, John Russell has posted a couple of exploratory articles on Python and Perl comparing them with PL/SQL. The observant person might recall that tahiti.oracle.com is a front page to Oracle's Database, Application Server and Collaboration Suite documentation. John does a lot of scripting magic with an ever changing set of manuals to build up an excellent online documentation system.