PortalPlayer Shares Soar in Market Debut  NEW YORK (Reuters) - Shares of PortalPlayer Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=PLAY.O target=/stocks/quickinfo/fullquote"&gt;PLAY.O&lt;/A&gt;  jumped as much as 62.4 percent in their first day of trading on  Friday after the company's initial public offering priced above  the recently increased range.