http://steamgames.com/tf2/heavy/sandvich.htm">Meet the Sandvich
Okay, I must say Valve just keeps making Team Fortress 2 better and better. I fired it up again a few nights ago after not playing it for months and I had a blast.
They've upgraded several of the classes (Medic, Pyro, and now the Heavy) with new achievements and weapons that you can acquire, and added a ton of new maps.
(It's apparently a free weekend for TF2, too)
I still think that Valve should just use the TF2 engine and make a television show.