We used to do this via Moodle and when we deteled a forum topic that topic would disappear from the feed. Moodle was unfortuently a bit unstable for this use though.
I have just tried the same thing in mahara but have noticed that when we delete a topic it doesn't delete from the feed.
Does anyone know of a way around this. Or the location of the feed files so that I can just run and job that deletes them every 10 mins and the cron can then recreate them
]]>