So are you saying that absolutely nobody that can do the job has applied? Or have you turned away qualified applicants because they aren't a "cultural fit" or properly credentialed? I'm betting on the later.
Well, our last developer hire had no degree of any kind, is 20 while everyone else is 36-50 and he is working out great. We've had 1 resume in the last 2 months come in. I wouldn't want to spoil your pre-conceived notions, though.
edit: By the way, I read your comment history. We do all our hiring through recruiters because we are a small team without the time to chase talent--our interest and time is spent coding.
Maybe that is the issue--you won't work with recruiters, and most ruby shops are small, so they outsource hiring to recruiters. As a datapoint for you, I got this job through a recruiter, and I'm quite happy with it. Recruiters got me several other interviews with decent places as well. There are decent recruiters out there with real jobs--you just have to use your gut about who isn't sketchy. We gave this opening to 3 different recruiters that we work with--maybe they called you and you ignored them.