Question [Q] Porting Jolla Sailfish to other devices

The CEO of Jolla has said in an interview that "Enabling Sailfish for a device such as Galaxy S3 [and other devices] is something that any community member [can] do.".

Since there doesn't appear to be any code or anything disclosed to the public (most importantly Silica UI), apart from the SDK, how is this possible? Are porters required to extract a filesystem from the SDK and work from there?

I would be very interested in porting Sailfish to the Xperia U if I knew how.