Radio UserLand: OPML in Manila Messages
Note to myself: gotta try it for my forthcoming article at Traffick.com.
Added 11/11/00: It works all right, but you need a renderer to format the HTML output, meaning you have to get into Frontier scripting. You can write your own outline renderers too. I have to admit I'm a bit confused here. In a more simple way, you can define rendering rules within the outline using XML tags (however I couldn't get Manila to accept them at this point.)
RU outline support for Manila sites goes beyond simple stories. It show you the site structure itself as an outline, a nice way to see the list of your stories. You can also customize RU with custom editing commands (RU crashed twice before I could add one to my rick-click menu, remember it's still a beta.)