OPML
ThoughtStorms Wiki
XML format for OutLiners promoted by DaveWiner
Never quite took off, but now the DigitalGardening people are discovering Dave (and he's discovering them), he's giving advice on how to support it.
Older stuff
- Distributed directories : http://www.podcatch.com/2005/07/14#a983
- ReadingLists
- TypedThreadedDiscussion almost had it working.
(TimeLink) SpreadsheetBasedApplications, could there also be OutlinerBasedApplications?
I wrote another defence thereof : http://eirepreneur.blogs.com/eirepreneur/2005/11/whyopmlis_win.html