Here are some points on mobile from Nielsen's media industry fact sheet:
> U.S. mobile phone users 13 and older top 223 million;
> Number of mobile Web users is up to 60.7 million (up 33 percent from 2008);
> Smartphones account for 18 percent of mobile devices (up from 13 percent in 2008);
> Eight percent of mobile device owners streamed audio via mobile phones, while 7 percent viewed video; and
> Twenty-five percent of mobile devices sold in Q3 2009 were smartphones; that's estimated to grow to 40 or 50 percent in 2010.
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