As soon you unlock the Bootloader, the API key to access the S-Master HX gets lost. There is no way to restore it. The Walkman App also no longer works.So that's probably why no cfw ... Time to get someone at xda involved
So unlocking the bootloader is an one way ticket.
The same thing happens to Xperia Smartphones who loose their API keys for accessing the camera, NFC and so on.
So unlocking the bootloader pretty much makes it unusable.