The folks at iCal World let us know that they officially launched today with iCal news, tips, help, applications, and an extensive iCal calendar library with hundreds of calendars in dozens of categories, all in a “sleek, fast, easy-to-navigate user interface.” The Web site also offers free public and private calendar hosting, and a paid secure hosting service that only grants calendar access to users in a pre-defined group via their own unique username and password. The site is currently running an introductory contest — for a limited time, everyone who contributes a public iCal calendar will qualify to win a new iPod.