This is a rather nifty tool. Similar to some of the other RDF visualization tools I've looked at over the last few months. It's only 1.4 MB or so. Runs really well under OS X (and only for Mac). I immediately worked out how to use it. Very nice.
The agents are only simple ones at the moment. Keyword searching. With a bit of manipulating it could make a nice front-end to Meerkat.
It even has the ability to get information from other RSS feeds. If it just had some decent screen scaping or everyone started using RSS I'd be happy.