But how? What software and/or web sites display that feed in a useful way? Most of the RSS aggregators I've seen expect things to be weblog-like (updated with daily news items), not calendar-like (a list of events that have not yet happened.)
One exception to this are the "slashboxes" on Slashdot, but I don't know of other sites that do that kind of thing. I guess the netscape.com portal used to do that, but all that crap got absorbed into the AOL collective years ago, right?
So who's using the calendar RSS and how?