Google Calendar is up, and looks pretty nice, though I can’t find ical export as is usually google’s practice. It is nice, though nothing seems particularly earthshaking about it. I’ve already filed an evo bug requesting the one feature that seems particularly nice. The rest just seems fairly polished and nice, but not ‘makes me rethink everything I knew about email’ the way gmail did.
[Edit: it has been pointed out that you can in fact export via iCal; it isn’t very obvious where it is, so I don’t feel bad about not finding it. :) Search for ‘iCal’ in the google calendar help function to get instructions on it. Now, if only the CalDAV people would hurry up and finish their spec so Google and Evo could implement that… :)]