I've just started to get into writing plugins, and I have an idea for one that involves modifying feed data before it is printed. Currently it works properly with the real posts, but I can't make it work with feeds. The whole premise of the plugin is to work with FeedBurner, but I can't even get it to work with the actual wordpress feed (which I believe FB taps into).
The filter for the post itself is add_filter('the_content', PLUGIN-NAME);
When I tried add_filter('the_content_rss', PLUGIN-NAME); it doesn't seem to modify anything.