JMS released two new pets and a cart equip slot for pets in the last patch (the pets aren't released yet, though). They released a raccoon, and a miniature ninja, along with a cart equip that goes under a new cart equip slot on the character equip screen. It apparently is a mount. And the pets each have two different versions of their equip; and they also level like reverse equips do. I have no idea how these work, sadly.
Raccoon
Ninja
As for the cart,
The new cart slot is located here:
