Nice! It also works just as well for AirSet (which I use) or any application that accepts iCal feeds. Lifehacker is quickly becoming one of my favorite blogs; I’ve gotten a lot of really useful tips from there lately.
Why AirSet? Primarily to allow my wife and I to sync our Palm PDAs so we each know what the other is doing. Being able to access our calendars it’s actually a secondary consideration, but also quite helpful. It also happens to be Laptop Magazine’s “Mobile App of the Month” for April.