This week we're pleased to welcome Marshall Simmonds, CEO of Define Search Strategies and Chief Strategist for the New York Times, to Whiteboard Studios. Whether or not to use topic pages--and how to use them effectively--is a topic of some debate in the SEO world. Well, who better to ask about it than the guy in charge of SEO strategy for the NYT and About.com, two of the topic page-iest sites on the web?

If you're using a topic page strategy, or you've considered it, watch this week's Whiteboard Friday. Marshall breaks down how and when they can be effective, pros and cons, as well as expenses and advantages to the strategy.