<A HREF="http://news.zdnet.com/2100-1040_22-5577396.html?tag=zdnn.alert">As many as 22 million American adults,</A> or about 11 percent of the U.S. population, own iPods or other MP3 players, a new study has found. The study, carried out by the nonprofit Pew Internet & American Life Project through phone interviews of more than 2,200 people, showed that those who are younger, wealthier and use the Internet are more likely to own such gadgets.