So far I’m really liking Google Calendar. I was able to import my 2 iCal files into Google Calendar with only a little fuss. After about 10-15 more minutes of exploring, I had it set up as I wanted. I don’t know of a compelling reason to keep the aforementioned Sunbird/WebDAV combo for shared calendars around, as GC is way more slick and there’s less setup mess for me. The only big feature that I’d really like to see soon is some support for Categories or Labels or something similar, but I’d be surprised if it’s very far off.