The mount that I am excited about is this fossilized raptor mount. It is picked up from working on your Archaeology profession. Check out this comment from ViceVersa on how to pick one up for yourself... Sounds like the Oracle dailies, rebuild egg/creature = chance to get mount or pet. (... thinking Night at the Museum)
Looking at WowHead's break down, there are a number of interesting mounts to come. Exalted with Goblins, Archaeology to get raptor, and the Horde scorpion, I am giddy.