Notch confirmed teh addition of pets to Minecraft 1.4 on his Tumblr on the 18 of March. These pets will be wolfs that follwo you, can be trained to sit using pork, tamed using a bone on a wild wolf or sent to attack an enemy if hit by the player. Heres a video link to Jeb (the coolest of the Majong crew) and him showing these pets in action...
......i didnt know what "u jelly?" was till i met you guys. it took me 17 days to figure out what "muk" was backwards, according to noodle. :/ so im pretty slow myself