Google's head of spam detection and correction Matt Cutts is calling for questions he will answer on upcoming videos, he announced on his blog.
Questions should be submitted to the Google Moderator page, Matt noted.
"I won't be able to answer every single question, but I'll tackle several popular ones plus a few of the more interesting questions. Please submit questions that lots of people would be interested in, not just a question about your specific site," he stated. There were 221 questions submitted at the time of this posting.