[Zope] rss feeds within zope

We have a nice working blog (stores entries in unique files and then iterates over them to display) and a rss file that seems to connect well. We've set up an aggregator and it seems ok but not quite what we expected as the files are html and not xml. There seem to be several Zope products for making rss compatable documents but I'm wondering if anyone has used any of them and can recommend something. Katie Legere Kingston Frontenac Public Library