At DoubleClick, we've had the privilege of picking the brains of several of the industry's thought leaders and innovators in digital marketing. We've captured a few of these key insights through our ThreeQuestions for Innovators video interview series: These interviews span the gamut of key industry themes and issues, including current trends and influencers, ad exchanges, social media, emerging media, and the future.

This month we're honored to highlight interviews with Carla Hendra, Chief Executive Officer of Ogilvy North America, as well as Ian Schafer, CEO and Founder of interactive marketing agency Deep Focus. Carla speaks to us on the challenges in the brave world of digital marketing, while Ian shares his insights on rich media, video, and the role of the agency in the advertising process.

We're excited about our lineup of thought leaders and the conversations they spark - whether it's about opportunities in a challenging economic environment, trends to watch for in 2009 or ground-breaking insights from innovative fields such as neuromarketing.