Omniscope's DataManager supports importing data layers from Esri ArcGIS Online. These layers can then be used in all Omniscope views or added to Map Views as overlays.
The following example assumes that you already have an ArcGIS Online account with at least one feature layer configured. You can sign up for an account by clicking on "Esri account help" in the DataManager block noted below and following the link.
INSTRUCTIONS
Create a new file in Omniscope and go to DataManager.
Under "Feeds", drag on a new 'ArcGIS feature layers' block.
Enter your ArcGIS Online username and password then click connect
Configure the search criteria then click 'Search' to find relevant Feature Services.
Choose one or more Feature Services then select the layers you would like to import into Omniscope.
Load the data into Omniscope then drag a Map View into Omniscope to see the postcode areas.
I'm afraid the connector isn't working as designed. Here's a screenshot of my attempt to connect via the DM to a live, paid account I have with ArcgGIS Online. Prompt cites error code 400