I have a requirement to create a "master" calendar at the root of the site. From there, events will be added. Then for each additional site created, the ability to add that master calendar to each site. So instead of each site having their own calendar, it's an exact copy of the master calendar.
I tried doing this a few different ways but ultimately I am surprised when I try to add a web part, it does not allow me to select from a different site, only within the one I am working in. This is on Foundations 2010 version in a hosted environment.