Google Hangouts are very handy for video chat, but much of the development has been aimed at individual users. One recent enhancement is much more firmly centred on corporate use: you can now look up names from the Global Address List to start a hangout.
Other corporate changes include the ability for admins to enable specific hangouts features, and full support for Hangouts if you have the paid support option. Hit the Google announcement post for more details.
Making it easier to bring Hangouts to work [Google Enterprise Blog]