Today we're unveiling the TF2 Contribution site. This nifty site will allow anyone who's made a custom piece of TF2 content to submit it to us, with a view to it appearing in-game. Many of you have been building fantastic TF2 work for a while now, and we wanted a way for you to get it in front of all TF2 players, and for everyone to see that you were the one that built it.
You can read more about the requirements for the items on the Tips + Tricks page, or read more about the system in general at the TF2 Blog.