Matt Cutts: How can I remove old content from Google’s index?
Topic: How can I remove old content from Google’s index? – Quick Answer: 404 for single page; block via robots.txt for all website
Matt Cutts: What should I do if I don’t know why I’m penalized?
Topic: What should I do if I don’t know why I’m penalized? – Quick Answer: Make sure site isn’t hacked. Go to Google Webmaster Help Forums, file reconsideration request
Matt Cutts: Which SEO agency do you recommend?
Topic: Which SEO agency do you recommend? – Quick Answer: Matt doesn’t recommend any
Matt Cutts: Why doesn’t Google use reCAPTCHA?
Topic: Why doesn’t Google use reCAPTCHA? – Quick Answer: They probably will, eventually
Matt Cutts: How accurate is link: search? Do links not in the list still get credit?
Topic: How accurate is link: search? Do links not in the list still get credit? – Quick Answer: It’s a subset of total backlinks. Use Webmaster Tools for more. And yes, they do
Matt Cutts: How many links on a page should we have? Is there a limit?
Topic: How many links on a page should we have? Is there a limit? – Quick Answer: No limit, but ensure the links are not spammy.