Recently active questions in Google about Google Calendar

How can I integrate Google Calendar in my Google Group?

Is there any way to add members from a Google Group to Google Calendar besides manually typing in all of their email addresses?

So I succeeded in making my Google calendar public and shared it with my group on Facebook. I want to allow anyone on my Facebook group to edit the Calendar without having to go through the steps of giving them admin privileges.

Is it possible to allow anyone to edit my public Google calendar? If so, how? If not, does a free public calendar application exist out there that allows free for all editing?

Thanks in advance!