Now, all Microsoft Dynamics NAV partners should be available to download NAV 2015 license from Voice.
As earlier, you can choose standard Dev/Demo license or Dev/Demo license with 180 day trial period and select modules you want.
Go to https://businesscenter.mbs.microsoft.com/ to download it.
Thnks for Sharing Aleksandar Totovic http://totovic.com/2014/10/05/nav-2015-license-for-partners/
The Dynamics World Ltd 