In Ekiga... go to "Edit Accounts" or use Ctrl-E.
Then under "Accounts" in the pulldown menu... (There are no options to add an account in the popup window... you have to find them in the pulldown menu (Unity on Ubuntu). Some people even think you can't use Ekiga with non Ekiga SIP accounts since they can't get past this step and even rated it low based on this, but the software is good. I have not used their pay service yet, but since they are generous enough to offer free accounts, and free software it might be worth giving them a look and buying some VOIP minutes if you need to call landlines.
Name: Google Hangout (Whatever you want to call it)
User: <YourEmailAddress@gmail.com>
Server: talk.google.com
Port: 5222
Resource: Ekiga
Password: <YourPassword>
Once finished under the accounts tab you should see a status of "connected".
http://www.Ekiga.net
