Embedding Google Calendar

When looking for an easy-to-use calendar to show availabilities of a campspot, we bumped into Google Calendar (again :)).
With the google account our customer already uses for Google Analytics, they can create a calendar. This calendar can easily be embedded in any website, and customized to the specific needs (e.g. set backgroundcolor and start with month-view).
One other nice feature: when you make the calendar public, your calendar is to be found in Google, adding extra visibility on yet another channel.