We can turn on the ability for multiple simultaneous moderators to see real-time updates.
When activated, changes that moderators make to the content in your Stack will be visible to other moderators in real time!
Further, your moderators will be able to 'lock' a piece of content when moderating it (ie. applying tags, publishing, queueing or disabling) and other moderators will see - in real time - that this specific piece of content has been 'locked' by another moderator and will not be able to moderate that item.
Ever used Google Apps with multiple users simultaneously editing the same spreadsheet or document? Same sort of thing.