From MMO Champion:
World of Warcraft PTR Patch 3.0.8
Racial restrictions on mounts have now been lifted. Night elves on mechanostrider? Tauren on raptor? You’re not seeing things.
Hell yes. Plus there are some nice buffs to Elemental Shamans, and the Magma and Searing Totems generate no threat (can you say A-O-E?). Of course these are all subject to change, but I hope that Taurens can ride any mount. Vary niice.