Ok I had a try writing my own rss aggregator in xsl and it only works if your inside my network, which is a shame. So I'm now on the look for a java servlet rss aggregator.
Interesting enough the older cousin of blojsom, bloxsom does have this already. Blagg News aggregator for the Bloxsom weblogging system.
Tempting to put a application on the server though… Seems to be quite a few .net ones. I cant believe no one has wrote a server based one for java yet! Specially with things like this done Java Collect
2 hours later after searching, I found it.
Flock is an RSS aggregator written in Java. It is a server-side web application accessible with a browser, similar in spirit to AmphetaDesk
Subscriptions are stored in an OPML file, yeah!