Handheld Satellite Radio Receiver is Unveiled XM Satellite Radio and radio manufacturer Delphi Tuesday introduced the Delphi XM MyFi, the latest entry in the battle over digital music, pitting XM against Sirius Satellite Radio and on-line music sources like Napster.\     &lt;FONT face="verdana,MS Sans Serif,arial,helvetica" size="-2"\ color="#666666"&gt;&lt;B&gt;-The Washington Post&lt;/B&gt;&lt;/FONT&gt;