Dr. McDougall has done a number of these live teleconferences the past few months, and I just got an email with a link to his website with sign-up instructions for two more.
These are nice 45 minute talks, with both the participants at their laptops on a program like Skype. On the right-hand side of the computer screen you'll see a chat box, where you can write in your questions for Dr. McDougall and the interviewer, Dr. Tolosa, will ask Dr. McDougall as many of these as there is time for, so if you do have a question for the doctor, ask it as soon as the chat opens, don't wait for a break in the conversation, because you won't find one.
If you have a difficult problem that may require the doctor to look something up, you might be better off writing him directly at email@example.com, because he's not sitting there with books or anything, just on his couch in his living room, laptop tuned to the chat program (sometimes buffering, and buffering), waiting for Mary to finish making the oatmeal (Yes, he actually said that).
Friendly and informative informal chats. I'm glad they decided to do more.