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That's going to be one heck of a weekend.
First the Medic, then Pyro, and now Mr. Heavy. Valve has announced that the Heavy class is next in line for Team Fortress 2 class updates (i.e. new weapons and achievements). Additionally, Valve said they will "open up the process a little" in talking about how the update is designed. The goal of the update is to "make the Heavy more viable when he has no Medic to pair with" but in a manner that does not significantly change the Heavy's role in the game. We're interested to see how those ideas and constratins translate to new firepower.
That's going to be one heck of a weekend.