But the super Turing machines busy beaver numbers vastly outgrow your iterated busy beaver very quickly. It doesn't take that many states to write a program that can do an iterated function application, and to a super Turing machine, it's easy to write the busy beaver function.
>>zeeboo+(OP)
OK, but as the article states you'll have to write a paper to a low-level journal to use it, and I'd have to be really into and good at mathematics to consider doing exactly that to win a name-the-biggest-number competition...