iWebCal – OS iCal Tool

iWebCal: Choose Calendar
iWebCal lets you view calendars from iCal (and other calendar tools) on the Web. Just upload your calendar file to the Internet somewhere and type its address in the box above. Read the quick start for more info, or see iWebCal in action with an example calendar from Apple’s calendar library.

Cool. Also works with the WebDAV-enabled versions of the Mozilla calendar tools. So, you could setup a group calendar that would be be pretty functional and web-enabled.