Conj/WHM has its own mount currently because Yoshi said he wanted to encourage people to play as a Conjurer to give some sort of balance to classes being chosen since usually people tend to stay away from more responsible jobs. As for the future I believe in the same PAX interview they are looking to add more specific ones for each job and jokingly saying that tank will be next.. sorry dont have a link.

Here is the mount for Vet rewards