This was a real blocker for testing as you needed to purchase a certificate from Symantec, but Microsoft have now released an awesome tool to help get a test bed up for demo\evaluation purposes, the kit comes with a few demo apps to deploy so now you can demo this new feature easily.
Check it out here
The Support Tool for Windows Intune Trial Management of Window Phone 8 enables Microsoft System Center 2012 Configuration Manager administrators to enable Windows Phone 8 Device management during the Intune Subscription trial period. The downloaded support tool contains a script that populates a sample Application Enrolment Token in the Microsoft System Center 2012 Configuration Manager environment, a sample Windows Phone 8 Company Portal app, and two sample applications that can be used for WP8 software distribution scenarios.
Thanks to Jörgen Nilsson for the ultra quick heads-up!