Updates to Team Fortress 2, Counter-Strike: Source, Day of Defeat: Source and Half-Life 2: Deathmatch have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Source Engine Changes (CS:S, DoD:S, TF2, HL2:DM)
Fixed an engine crash caused by too many precached models in some community maps.
Day of Defeat: Source
Fixed an exploit where clients could prevent weapons from recoiling properly.
Team Fortress 2
Added several crafting recipes for new weapons.
Added a ton of items to the store.
Added a ton of items to the random drop list.
The following hats are now paintable or have had their paintability improved: Pyromancer's Mask, Detective Noir, Madame Dixie, Buckaroos Hat, German Gonzila, Flipped Trilby, Coupe D'isaster
Fixed a spelling error on the "Pyromancer's Mask".
Corrected the name of the "Claidheamh Mòr" to the joy of our Celtic players.
Made "Le Party Phantom" a misc slot item.
Fixed a client crash caused by custom stats panels.
Fixed a bug where some new items weren't being dropped correctly.
Removed displaying the top 10 players in the leaderboard if you have never won a duel.
Updated the localization files.
Fixed a regression in Tournament Mode item whitelists.
Also added "mp_tournament_whitelist", a convar that allows servers to specify a whitelist file to use.