Microsoft details the next few weeks' worth of Xbox Live Arcade, Deals of the Week, Avatar items, and Games on Demand, with twelve days of special holiday deals kicking off on December 18th.

Cover your hideous meat-face with a collection of attractive and stylish robot heads today, as Activision releases a set of Transformers gear onto the Xbox Live Avatar Marketplace.

The Fallout 3 t-shirt is nice. The Vault 101 Suit is even better. The Vault Boy head? Possibly the best use of 80 Microsoft points in the history of fake money.

Display your love for your favorite institute of higher learning with the Xbox Live Avatar Marketplace University Collection, as long as yours is one of the top 30 U.S. Universities.

My Xbox Live friends list should look a whole lot cooler now that Mass Effect space suits and clothing have hit the Avatar Marketplace.

Now you don't even have to leave your computer to buy clothes for your little Xbox person or purchase full 360 titles, as Microsoft adds the Avatar Marketplace and Games on Demand to Xbox.com.

Whether you think the new Avatar marketplace on the 360 is a great way to customise your online persona or a stupid waste of everyone's time and money, you'll probably want to take a look at the wardrobe options.

Avatars, long the ignored, under-dressed face of the Xbox 360, are getting an overhaul. But it will cost you. New clothing and props from popular games including The Secret of Monkey Island and Halo will be hitting the 360 next month.