FYI; I didn't easily find an answer to this so I'm putting it here
If you have Domo and Salesforce you can build a tab in Salesforce that launches Domo inside of it. Here's a link to a page giving you instructions for any web page. Just insert your domo https:// and you'll be good to go.
http://www.infallibletechie.com/2013/03/how-to-create-splash-page-in-salesforce.html
