Despite its shortcomings (I’m looking forward to the 1.1 release), the whole iCal “system” is pretty cool. Several websites have sprung up around iCal.
iCal Exchange is a free service where you can publish your iCal calendars so that others may subscribe to them. It serves as an alternative to Apple’s pricey .Mac service (which has some good features, just not $100/year worth).
iCalShare is a directory/bulletinboard for posting links to iCal calendars published elsewhere. They’ve got a hundred or so already. They also have a great page of links to other iCal resources.
Also, there’s an iCal blog, which covers news, updates, tips, etc. for iCal, but I can’t for the life of me find it right now. I’ll upate this post when I come across it again.
I created an Arkansas Razorbacks Football calendar, published it on iCal Exchange, and posted it to iCalShare.