Karmazin Brings Sirius Starpower to Radio You might have thought that Sirius got serious when it hired Howard, but the second-place satellite radio company is upping some serious ante now by enlisting former Viacom President Mel Karmazin. &lt;FONT face="verdana,MS Sans Serif,arial,helvetica" size="-2" color="#666666"&gt;&lt;B&gt;-washingtonpost.com&lt;/b&gt;&lt;/font&gt;