Old idea, just thought I would bring it up again. Basically you tame a pet, then take it home, and use some sort of method to make it a "house pet" making it yellow, and free to roam around your house. I would also take it a step further, and have some method to have ANY creature become a house pet (or guest if you will), maybe have it be a rare drop on every monster. A house guest deed or some such. It could bring more life to theme houses like orc forts (orcs of course), haunted houses (roaming specters, and zombies), Evil player houses (Evil mage lords, Demons etc) and on and on. And finally you could actually have a giant spider present in a house full of giant webs! I'm not sure they could make it so it wont leave the house easily, but I think this would be a great addition, something else to help people customize their homes. It could be a cool system to mess around with.