There is a glyph in MoP that turns your Travel form as a druid from a cheetah into a rideable stag. You can be a vehicle, a la Sandstone Drake.
Edit: It appears Stag form is now the default. Cheetah will be a glyph, and Glyph of the Stag makes your stag travel form rideable. The video is just the stag travel form, and it's purty.
Edited, Jul 20th 2012 4:29am by IDrownFish