I think a list comprehension reads better than a generator (and works the same) in this case:

  def fizzbuzz(num):
      return (word for value, word in words if num % value == 0)

And even dropping the fizzbuzz function altogether reads quite nicely IMHO, though it starts to look a bit golfed:

  words = ((3, 'Fizz'), (5, 'Buzz'))

  for i in range(1, 101):
      print ''.join(s for n, s in words if i % n == 0) or i