Remember Airpush, the ad network that was widely considered one of the most intrusive, irritating methods of advertising in existence (so much so that Lookout released a special app to fight it off)? Well, it looks like the folks at SellARing (pronounced "sell a ring") have come up with something even more insidious.
SellARing's ad network essentially allows associated apps to replace the familiar "ring ring" sound you hear after dialing a number with a selection of 10-second audio ads.
The service lists NBC, Walmart, Vodafone, FOX, and others as among already-enlisted audio advertisers, and boasts a booked campaign calendar for May 2012, noting that they "have demand for more Android apps," while promising five-minute integration with a proprietary SDK.




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