More Google Products: "Calendar
Organize your schedule and share events with friends"
Guess I missed the release of the Google Calendar.
Speculation had been rife of an impending April 1st release (to coincide with Gmails birthday), but we got nothing more than the obligatory (April Fool).
It is out now along with an API, but has to compete with the already excellent 30boxes and the likes of kiko and the Microsoft Windows Live Calendar Gadget Solution, and possibly a forthcoming Windows Live service.