I'm researching a class I'm putting together on RSS and came across this free RSS Calendar. You can publish to a blog, export to an aggregator or iCal, even allow comments. I like it!

RSSCalendar is an exciting new way for individuals and organizations to share their calendars with family, friends, and co-workers - utilizing the latest in "Really Simple Syndication" (RSS) technology, including RSS channel creation and aggregation. Not only is RSSCalendar easy to use but it is also easy to administer, and setup is a snap. RSSCalendar is well-suited for a variety of uses, including:

Individual calendars

Family calendars

Company calendars

School calendars

Organization calendars

Team calendars

City calendars

http://www.rsscalendar.com/