I think mod_php doesn't play nice with apache2 but am not aware of any cgi interoperability problems.
Generally it's recommended to configure apache2 in the child process mode (eg the way that 1.3 works) when using PHP as many library modules are alleged not to be threadsafe. Some Linux distributions ship standard this way.
-- brion vibber (brion @ pobox.com) -- http://mail.python.org/mailman/listinfo/python-list
