In the latest build, Wowhead lists only one notable pet-related change: Sphere of Ultimate Destruction renamed to Iron Starlette.
If you'll remember, LeCraft mentioned this yet-to-be-named pet on Twitter in early March, and one of the suggestions for the name was...*drumroll* Iron Starlette! :)
The only other update that caught my attention was the new mage polymorph: PEACOCK. Yes, that's right. A peacock. Mumper previously mentioned that they were working on a peacock pet, so with the implementation of this polymorph, I can only hope that the pet is well on its way and will be coming to a pet collection near you soon. It would make an excellent addition to my Look-a-Like Challenge - peacock pals please!
That's it for now, but hopefully we'll see more in the near future. I'm starting to get antsy - MOAR PETS.