43 Folders discussion of using RSS feeds for calendars, todo lists, etc.
I wrote a draft proposal for Evergreen when I worked in the IT department for a web based PIM system for students that would output RSS feeds. The main reason for this was that students could then use the feeds anyway they like – on PDAs, any OS, etc.
I still think it’s a great idea for helping college students get organized. If I get this new job, I’ll have to dig out that proposal and check some of the apps from this thread.