Have you seen TagCloud? It's a visual way to see what's being talked about among your trusted network. You add feeds (or your OPML file) and it gives you a tag cloud of what's being talked about.
What's a tag cloud? Basically, it's a list of keywords that your feeds are talking about. The bigger the tag (keyword), the more it's being talked about.
One downside - my largest word is HTTP, something that's underlying every post created that links somewhere, but not usually the focus of the post. Oh well. It's still a pretty cool way to browse topics and see what your network is talking about.
By the way, here's my tag cloud for OPML as of this morning.