I know that there are probably some plugins out there that will accomplish this same exact thing but if you are looking for a way to exclude a category on the fly with a wordpress website, this method will work. Just locate the category ID# and append it to your feed in Feedburner like so…
Why would this be useful? Let’s say you have a newspaper website that runs Obituaries as a category and you have the RSS Feed plugged into another site that wants to share everything but obituaries, this will do the trick.
Another one of my recent projects has been a political website for Republican First Congressional District Candidate Rick Crawford. We were retained by the Crawford Campaign to redesign their existing website and to incorporate some new functionality to their base 




