This is just a thought... but... I wonder what the response would be if you had someone with a good solid e-mail list, e-mail their list for you.
All you would have to provide them with is a description of the page and an incentive to join.
Of course if you own the list you could imbed a Facebook badge so it would appear in your newsletters. But I wonder what type of increase you would see to the Facebook page and how many people you could get to stick around?