Yes you can link bluejeans premium dial-in numbers to " Bluejeans for hangout meetings". To make this work Premium dial-in numbers plan needs to be enabled for your enterprise. You need to contact your customer success manager or account manager to get this paid plan enabled.
Google Chromebox connections are supported with " Bluejeans for hangout meetings".
We preserve most of the features from google hangouts in " Bluejeans for hangout meetings" product. Screen share, chat etc