I was sitting on my server when i realised a way to make some gold for the holiday season.
On my Server the Santa hats are a huge hit and everyone wants one, so here is what i thought...
Get a group together with a warlock in it.
Find an instance where it is pretty easy to get to the final boss.
send your 5th member out to IF/SW or for horde UD/TB/Org and have them say that you are selling a christmas hat (make sure to include the color).
When you find a buyer just send a summon to him and kill the boss and give him the hat when he pays.
I dont know about other servers but i have done this 5 times so far and the hats are going for 10-20g in prices. (thats what people are offering to get them one)
give it a try and give me some feedback to how it goes on your servers.