My "I'm going to hell" C++ version: https://gist.github.com/3838042

Or, since github's being broken right now:

    #include <iostream>
    #include <arpa/inet.h>
    
    template <int multiples_of, uint32_t noise>
    class Noisemaker {
    private:
        union {
            uint32_t noise_as_int;
            char noise_as_cstr[5];
        };
    public:
        Noisemaker() {
            noise_as_int = htonl(noise);
            noise_as_cstr[4] = '\0';
        }
        bool operator()(std::ostream &out, int i) {
            if(i % multiples_of == 0) {
                out << noise_as_cstr;
                return true;
            }
            return false;
        }
    };
    
    template <typename Noise1, typename Noise2>
    class NoisemakerPair {
    private:
        Noise1 noise1;
        Noise2 noise2;
    public:
        bool operator()(std::ostream &out, int i) {
            bool matched = false;
            matched |= noise1(out, i);
            matched |= noise2(out, i);
            return matched;
        }
    };
    
    int main(int argc, char *argv[]) {
        NoisemakerPair<Noisemaker<3, 'Fizz'>, Noisemaker<5, 'Buzz'> > fizzbuzz;
        for(int i=1;i<=100;++i) {
            if(!fizzbuzz(std::cout, i))
                std::cout << i;
            std::cout << std::endl;
        }
    }

You can nest NoisemakerPairs to add more Noisemakers. But good luck with strings longer than 4 characters… for some absurd reason, string literals can't be template parameters. Go figure.