Something that would save a lot of time, for us at least, would be an option in the context menu which is displayed when you right-click on any item in the Content Explorer. It would be called something like “Switch to Community of Item” and it would do exactly that, saving the user from having to view properties of the item, find the community of the item, click on the community in the top-right corner, select the community, and click on Go. It would only appear in the menu if the item was in a different community from the one that the user is currently logged into, and if the user can log in to the community of the item.
Andrew.