Valve has announced the first annual "Manniversary Update and Sale" to 'celebrate' the fourth year of Team Fortress 2.Says the blurb, "One year ago, Valve introduced the "Mann Co. Store" to TF2 which allows community members to design, buy, sell and trade items wearable by the game's characters. During the past year, community item-creators have made over $2,000,000 selling their digital creations through the Mann Co. Store.
"As part of the Manniversary celebration, almost everything in the Mann Co. in-game store will be on sale until Monday, October 17th."
Full details here.