Feed yourself

[sgpratley]

I'm looking for a CMS solution which allows users to easily create RSS feeds based on their own citeria.

For example, a site about marketing widgets may have numerous categories such as PPC, SEO, widget maufacture, and The Original Widget Company.

If the user only wants to get feeds about The Original Widget Company they should easily be able to find a way to get that particular feed.

Any ideas? Tried mucking about with Joomla with the tags component but can't get the RSS to churn out what I want apart from by defining every possible combination myself, which ain't good.