Is Radio's usefulness hard to uncover? Ask Don Park:

Formal Blogroll

My blogroll is now defined inside an OPML file and divided into sections to make room for a Korean [language] blogroll.  If you use Radio and want to do the same, checkout Jake Savin's tutorial “How to create a Blogroll with Radio's outliner“.  Worst part was finding the tutorial.

[Don Park's Blog]

I had the same problem. Something as simple as a list of online authors is hard to do until you stumble upon the instructions. Can't wait for this.