Hotfixed :< tried it right now 10th February 23:30
I did this in booty bay just an hour ago, so Jackx is completely wrong.
Going to try, this looks awesome. :P
Tried this last night with a DK buddy and my DK, works great from Booty Bay, however we could not get it to work at Auberdine on any of the 3 boats there. Will try more places later!
We did run into a few bugs while on the boat under Alterac, at one point I could not see my friend or one other person moving at all but another person was moving around normally. Then when I relogged, I logged in and was stuck in place, unable to turn or move (my suggestion dont relog!).