Nice idea Pat
I don't FB, but there is also the Google Docs option if they just need a Calendar and Documents (with revisions), etc.

https://www.google.com/docs/about/

However, both of these options are much different than a website. As Pat noted "a website needs to be promoted and advertised in order to drive traffic to it" .. but only if driving traffic to it is one of the goals.
If they just need common access to some files, that's even easier.


Make your sound your own!
.. I do not work here, but the benefits are still awesome