Icecrown "Log Ride"
A couple weeks ago, I found the log ride in Grizzly Hills.
Now how about this!? Starting at the Grom'arsh Crash Site, talk the flight master there, when you chose the new Temple of the Storms stop, instead of a griffon or wyvern, you'll be equipped with a snowboard. 10 second later and a few half pipe, double flips later, your down at the base of the hill. Mount up, and do it again!
Oh, it would be fun! Blizzard, are you listening?