How do I get the domain and language selection show up in the Site Information like in the example image shown on the project page?

Extracted from http://drupal.org/node/1714474

NOTE: If you need to have variables that are both multilingual AND domain variables, you must also enable the Domain+I18n Variables Integration sub-module.

You configure variables to be multilingual and domain-specific, separately. If you configure the same variables to be both "multilingual" and "domain-specific", then they will automatically show up as "multilingual domain variables". So, just go to settings for "multilingual variables" and select "sitename" and "frontpage", then go to settings for "domain variables" and do the same.

Once you have configured them, the realm selection widgets should automatically appear on the site-information form.