TF2's Update Is Hatless
Yep, no headgear this time, just other stuff. There's a smaller Badlands map for King of the Hill, there are tweaks and optimisations to visuals and hidden clevers like memory usage. More importantly, perhaps, there's some basic stuff to help out newbies, including new basic training and a coaching system that will matchmake coaches with people who need to learn to play a bit better. That's nice. The full details are here.