The new ad type would differ from those that are currently available, this person said.

WSJ: New Financing Values Twitter As High As $7 Billion

Mobile advertiser AdMob has been testing out a new type of iPhone ad that it says generated more user engagement than its standard ads.

FORBES: IPhone Interactive Video Ad Drives Ubisoft Game's Brand Awareness

In the past, that type of coordination happened on an ad hoc basis, an administration official said.

CNN: U.S. government agencies shape cyberwarning strategy

According to recent articles in Ad Age, this type of thing is drawing a lot of watchdog scrutiny and may even become illegal.

NPR: Slate's Ad Report Card: Burger King's Buzz Marketing

Nissan then needed to figure out when consumers are most swayed by an ad--and what type of pitch is ideal.

FORBES: Magazine Article

It's the distiller's first change in 40 years of running staid black-and-white ads in the U.S. One ad in tall, slender type on deliberately weathered paper declares the Old No. 7 brand to be the same since the Sixties -- the 1860s.

FORBES: Gutenberg revisited

The outdoor ad business doesn't offer the same type of audience-targeting capabilities as online display.

WSJ: Auction System Helps Place Digital Outdoor Ads

Both AOL and Yahoo are under pressure from "advertising exchanges, " the lingo for services that allows advertisers to bid for ad space across a multitude of properties that reach a particular type of user.

WSJ: Deluge of Content on the Web Swamps Yahoo

This revenue is dependent on prevailing ad rates, the number of ads shown per page, the type of ads used and the nature of the ads.

FORBES: Squint Your Eyes And Facebook Looks Like A $55 Billion Biz