No, Hunter pets remain as they look when you tame them. For all other classes with pets the same goes, they look the same for all people with that class.
In Cataclysm, Death Knights will get an ability that changes the way their Ghoul looks (on a cooldown) into something more like an Abomination, which will also give them new abilities. This is the only "customization" announced so far.
Yes. you can as a matter of fact you can customize zhu zhu pets. Mainly by using non-toxic spray paints or sharpies. I have recently customized my chunk and my nutty the squirrel.
Hunters ---------- locks and deathknights
You can get vanity non-combat pets but none that are useful while fighting.
Rogues can have noncombat pets and guardians. Guardians can assist in combat, but are not controlled directly by the summoner. These are different from the pets available to the Warlock, Hunter, and Death Knight.
http://www.wowhead.com/?spells=-6 has a list of all the Non-Combat pets in WoW
Yes, you can customize and create pets, plus you can adopt and make two dogs have puppy's it's a pretty fun game i play it all the time
There is a WoW battle pet named Willie. Willie can fly and can be traded with other players of WoW. In the book or Journal, a player is allowed three pets.
No pets? A Warlock without a pet is like a warrior without a sword. Just plain idiotic.
On the emails click the button at the bottom that says "click here!". After it brings you to a page that lets you customize your name, icon, and payment. On that page it also has pet exchange!
Pets will automatically level as you do. When you gain a level, your pet gains a level.
Sims 3 Unleashed has pets. It will come out October 1st. It will have many animals, including horses you can ride, name customize and possibly breed! The trailer is on youtube! :) watch it its good! :D------------------------------------------------------------ sims 3 pets comes out 21st october :)
You can get the wow factor for your party invitations at partyworld dot com. They allow you to customize them anyway you want. I went there last time I had to make them.