Created by Bernard Flach and Peter Overbleeke the service is called opmlmanager.com and I like it a lot. I've had problems with Dave Winer's OPML Editor
(I'm getting a fatal error, can't uninstall - I know there's a fix but
I can't be rss'd to fix it all) so this simple web-based OPML editing
and hosting service is just what I need right now (currently using notepad).
What I like about opmlmanager.com:
More info at Peter's post.
(more of my OPML posts or others' at Technorati: OPML)