The Google Embeddable Calendar Helper rocks. You can create multiple Google calenders under your account and create one merged calender view showing all of them. We created a shared calendar for Church of the Resurrection, Hosanna Assemblea de Dios, and Holy Apostles church here:
http://resurrectionbellevue.org/happening/calendar
You can color code the various calenders. The view provides a drop-down selector where users can pick which calenders to display – and a “save as” feature off the print button that creates a PDF. Nice.
