Have a patch for adding podcast support to the rss 1.1.0 plugin. I am going to port this over to the 1.1.7 release and fix some of the white space issues I caused while sorting through the primordial soup.
Patch for rev 19796 to add podcast tags to the rss feeds. As far as I know this is the 1.1.7 version of the plugin.
File Added: g2_rss_1.1.7_podcast.patch