Our XPO guys never stop improving their product according to customers requests (e.g., check out this Support Center thread as it led to this good news).

From http://www.devexpress.com/Support/Center/p/S170549.aspx:

To help you get started with the XPO OData Service, we have implemented a new wizard that creates a service and does all the plumbing for you.
Here is a short video that demonstrates its capabilities:

View on screencast.com »

I hope you will like this improvement as this wizard will surely save your time. If you do not yet know what to do with this OData service, check out the links below:-)

See Also:
How to deploy the OData security service in the Cloud for further use by a mobile DXTREME client
How to configure ODataService for a DXTREME HTML5/JS application
Documentation - Describe XPO OData service