It's actually fucking amazing, isn't it? Now I just need to work out if there's an easy way to synch my SE phone with it, but it looks like that's only possible with OSX. Ah well, mobile alerts will have to do.
But yeah, I've got my Last.FM events showing in it and my Facebook events, plus the band calendar linked through. It's pretty sweet.
Add to that if you click to enter an event you can just type:
Rehearsal @ enterprise 6.30-9.30pm and it'll process that as the three separate pieces of information on that event.