No matter how shaky the economy, marketers keep spending more in the digital space. Why? For one, it's more measurable and targeted than most other media. But perhaps more so, because there are more opportunities online than ever before for brand marketing to integrate with direct marketing.

After describing the current Internet marketing landscape, including US ad spending and growth predictions, eMarketer's Senior Analyst David Hallerman leads a lively discussion with a panel of top digital players. They provide examples on the interplay of direct and brand and the pros and cons of behavioral and network targeting, video, search and emerging areas like social networking and mobile marketing.