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If that's too complicated for your needs then the simpler approach has been to use 3rd party javascript. You can include a small snippet of javascript to your site and your feeds will be displayed that way.
If you're looking for a good list of software options for RSS display I've found a pretty good list of them on the RSS Specifications [rss-specifications.com] site.
HTH
[edited by: bill at 9:32 am (utc) on Feb. 5, 2009]
[edit reason] see sticky mail [/edit]