Valve has updated Team Fortresss 2 with a community-crafted items update.
The game will automatically patch when you log into Steam.
It includes the new community-built hats so they can be crafted along with and update to the Camera Beard and Medic Mask so they can also be crafted as hats.
The community-crafted update includes new weapons and items submitted by TF fans, one of which allows you to turn your Heavy Weapon into Elvis with one of the new items.
Awesome stuff, there.