We have made a couple of minor updates to the Contacts web app:
You can now select multiple contacts and assign them to an owner, or else set them to “Unassigned”. Note that you have to be an administrator or manager in order to do this.
Contact and company groups now have an Owner field. Standard users can only see groups that they own. When you create a group, it defaults to you as the owner. An administrator or manager can now change the group owner or set it to unassigned in the Edit Groups/Regions menu.