Good idea - Adam Wendt is using his Radio Outliner to maintain his What I'm Rreading list. If I had more than two categories in mine (read and someday-I'll-get-around-to-reading-these), I would do this, too. I am envious of his reading time!

"Tis is a perfect example of what you can do with the outliner. Once I read something a few key presses will move it to a new list of stuff read and I can add links to my review. Once something gets delivered from Amazon a few keys will categorize it in the reading list. I'm really starting to like the outliner."

I'm still trying to figure out uses for my outliner....

Addendum: Rick Klau has documented Managing Your Links List in Radio using the Radio Outliner, which is another great idea!