The other day after pumping everyone in my office for advert ideas,
trying them too only see them under perform current ads, my business
partner asks the obvious question.

"well, why don't we get external help for writing/improving our ads, the same way we do with our graphics?"

Has anyone ever used an external consultant to help develop better performing adverts for adwords/yahoo before? If so, what is your advice in this area?

I am a little reluctant in that we have had a consultant come to
our office, and it was clear from their input, that we were more
advanced than they were. But that does not mean there is not someone
out there way better than we are. How do we find them?