Firstly thanks for your efforts Alan and gratz to Kondorhawkx !
About vanity pets... well I gotta say I love them dearly. I collected many of them and skilled up engineering only for a pet on several chars. I even bought the Pandaren Monk because he's just plain awesome.
I absolutely hope we'll get those, there are several types of droids or critters you could have as a vanity pet. Imagine a Chiss IA with an Ysalamir, that would be awesome.
The potential problem I see with them is pvp targeting. Using tab and targeting the pet instead of a player could lose you the fight.
And that's the fun thing in PvP ^^ It was hilarious in WoW to not see a rogue in stealth but his vanity pet right beside him.
Oh and Koujow... I feel you, Firelands Patch just released in WoW and I am the only one left out from the guild, because of bad roll luck. -.- I'm pretty pissed by now.