I was excited to follow the development of this through the newsletter, but I'm not a customer now. Maybe if you offered to trickle out the interview content as you developed it, for some kind of $9/mo fee? I would've been on board with that, or a similar approach. Though I guess not being a total squid I might not have been your target, I was really just interested in what those accomplished professionals had to say, maybe also thumbing through the book -- which while I'm at it -- I'm also not convinced provides the kind of value a $30 price should. I was kind've under the impression you'd include some real "how-to" meat, at least periodically, but there doesn't appear to be any of that. I think I'd get more value out of "Don't Make Me Think" or "Rocket Surgery Made Easy", and I could score both in a native kindle format(for $30).
I think you probably did a lot of hard work, and I'm still tempted to spend the $200 just for the interviews; but I don't feel good enough about what I might be getting. I saw the early version of the Ryan Singer interview and it didn't leave a $200 impression. I hope you've had a lot more success selling to others who really need a comprehensive resource or don't understand many of the fundamentals, it certainly seemed like it would be more valuable for them.
Also, just as an aside, the WordPress favicon feels cheap, and worse, lazy.