The weave package allows the inclusion of C/C++ within Python code. It is part of the larger SciPy package (http://www.scipy.org), but is also available as a stand alone package (http://www.scipy.org/Weave) so that more people can try it out.
The GPL'd AsynCluster project contains a package svpmc, which has a module svpmc.weave. The Weaver class in that module provides a convenient API for running C/C++ code with weave.inline. See the svpmc.sample module and its companion C code file for an example of usage.