Excellent - thanks. I've been looking all through the HELP files on iCal and couldn't find this. Lots of other HELP, but not this.
I switched from PCs about 9 months ago and was using Entourage because it was "Outlook." But there are a lot of reasons why I'm going to give the Apple applications a whirl. Mostly related to the ease of backing up and sharing calendars on .Mac.