Outsiders can tell when contrarians are right by assessing their arguments, once they've decided the contrarians are worth listening to. This in turn can be ascertained through the usual means, such as association with credentialed or otherwise high-status folks. So for instance, you are affiliated with a respectable institution, Bostrom with an even more respectable institution, and the fact that EY was co-blogging at Overcoming Bias thus implied that if your and Bostrom's arguments were worth listening to, so were his. (This is more or less my own story; and I started reading Overcoming Bias because it appeared on Scott Aaronson's blogroll.)
Hence it seems that Yudkowsky's affiliations are already strong enough to signal competence to those academics interested in the subjects he deals with, in which case we should expect to see detailed, inside-view analyses from insiders who disagree. In the absence of that, we have to conclude that insiders either agree or are simply unaware -- and the latter, if I understand correctly, is a problem whose solution falls more under the responsibility of people like Vassar rather than Yudkowsky.
No for most people it is infeasible to evaluate who is right by working through the details of the arguments. The fact that Eliezer wrote on a blog affiliated with Oxford is very surely not enough to lead one to expect detailed rebuttal analyses from academics who disagree with him.
As promised, here is the "Q" part of the Less Wrong Video Q&A with Eliezer Yudkowsky.
The Rules
1) One question per comment (to allow voting to carry more information about people's preferences).
2) Try to be as clear and concise as possible. If your question can't be condensed to a few paragraphs, you should probably ask in a separate post. Make sure you have an actual question somewhere in there (you can bold it to make it easier to scan).
3) Eliezer hasn't been subpoenaed. He will simply ignore the questions he doesn't want to answer, even if they somehow received 3^^^3 votes.
4) If you reference certain things that are online in your question, provide a link.
5) This thread will be open to questions and votes for at least 7 days. After that, it is up to Eliezer to decide when the best time to film his answers will be. [Update: Today, November 18, marks the 7th day since this thread was posted. If you haven't already done so, now would be a good time to review the questions and vote for your favorites.]
Suggestions
Don't limit yourself to things that have been mentioned on OB/LW. I expect that this will be the majority of questions, but you shouldn't feel limited to these topics. I've always found that a wide variety of topics makes a Q&A more interesting. If you're uncertain, ask anyway and let the voting sort out the wheat from the chaff.
It's okay to attempt humor (but good luck, it's a tough crowd).
If a discussion breaks out about a question (f.ex. to ask for clarifications) and the original poster decides to modify the question, the top level comment should be updated with the modified question (make it easy to find your question, don't have the latest version buried in a long thread).
Update: Eliezer's video answers to 30 questions from this thread can be found here.