Ad Age published its 2007 Digital Fact Pack, pulling together data and trends to guide marketers in the transient digital space.

Among the findings, big players continue to dominate online advertising due to their scale in audience numbers and ability to re-aggregate smaller, disparate audiences. The top 10 online properties took in 99 percent of 2006 gross online ad revenues.

In emerging media, social networking is flourishing. MySpace and Facebook grew 72.5 percent and 59.2 percent respectively from Feb. '06 to Feb. '07. However, consumers have yet to warm up to the idea of mobile advertising - more than half of consumers are not at all willing to watch ads on their phones in return for free mobile phone applications.