Advertisers spent $34 mln in 2004 on in-game ads. But that amount is expected to explode to $562 mln by 2009, according to The Yankee Group. Including <a href="http://www.wordspy.com/words/advergame.asp" title="advergames“>advergames (games built solely to promote a product) game advertising will approach $1 bln by the end of the decade.
