I was PVPing with my 65 warlock yesterday and I noticed that my after I got out of the BG again I was on my Dreadsteed and my pet was following me.
How you do this is... you get on your Mount speak to one of those people walking around the city asking you to go to the Battleground. MAKE SURE YOU'RE MOUNTED WHEN ENTERING THE BG. As soon as you're about to win
(or loose) make sure you're NOT on you're mount.
Result: You with you're pet riding across the lands...
P.S. This seems to need a bit of lag... Was confirmed Server- and Clientside though
Have fun Warlocks! :wave: