There's some shit going down at the official Team Fortress 2 web site right now. Bird shit, more specifically, is all over the game's blog, as are a few defecating doves. Team Fortress 2 players are also reporting the appearance of doves in-game. What does it all mean?
Well, it may mean the impending arrival of "Meet the Medic," the long-awaited next entry in Valve's increasingly impressive videos that focus on one of the game's nine classes. How did we get from dove excrement to Medic? Well, the three birds perched above the blog's banner lead to pictures of a hospital, waiting room and doctor's office, so "Meet the Medic" is as good a guess as any, especially since the video was said to have been "about 80-90%~ done" by a fan who visited Valve HQ in March.
Going by Valve's previous efforts in keeping Team Fortress 2 fresh, I'd expect at least one of the following to be released soon, if "Meet the Medic" is imminent: new hats, new maps, new hats, new multiplayer modes and/or new hats.
Official blog [Team Fortress - thanks, Spookygunslinger!]