One thing we plan to add this year is a locations feature. Something that works similarly to a directory listing that can display all the campus locations on a map for multisite churches. We use a backend framework called Meta Box, and they have a tutorial available for how to do it here:
Once we figure this out on a smaller scale, we can develop the same features into a stand-alone directory site at searchfor.church that automatically pulls any listings from our network so that clients can be listed for free. Any churches who wish to be added to the directory could also pay a one time fee to create the listing.
We will also add this feature to groups, with the option for non-exact locations (to provide privacy to group leaders).