Valve has begun rolling out information for the next Team Fortress 2 update, entitled the "Classless Update." This will be the first content update in Team Fortress 2 that won't include large improvements and items for one of the game's classes, hence the "Classless" title. Instead, it focuses on three things: king of the hill mode, new maps, and new hats. Yes, hats.

We've done this song and dance before. They're going to update every day with a little more information. A new map here, some new hats here, a little joke here. It's going to be funny, and you can find it yourself. In the past, we've followed each day and watched for little clues and hints, hoping to find out more information. That isn't really necessary here, since the hats are mostly cosmetic, and the maps aren't all too interesting. If there's anything "OMFG" worthy we'll surely update it, but as of now enjoy the new clothing options for one of the best competative FPS experiences out there

[Source]