As I've had time, I've continued to work on Renquist, and have added some support for feed lists. Thus, rather than subscribing to a particular feed, a person can subscribe to a list of feeds. For instance, maybe my friend John is always finding new webcomics. I can just subscribe to his feed list and I'll automatically start seeing the new comics, too, as he adds them.
The next step may be to cook up a template so I can output feed lists in OPML format.