Mobile Advertising Begins to Take Off - WSJ.com
Jay Jamison stashed this in mobile
Stashed in: Mobile Ads!
Marketers are finally convinced that there's money to be made peddling everything from soap to salad dressing to the legions of consumers glued to their smartphones and tablets: Spending on mobile advertising more than doubled in the first half of the year.
Mobile-ad spending in the U.S. totaled $3 billion in the first half, up from $1.2 billion a year earlier, the Interactive Advertising Bureau estimates.
I don't have a WSJ login but my understanding is that Google owns half this market right now.
Facebook, Pandora, and Twitter are the other 3 big players.