Google Slashes IPO, Gets Pricing Go-Ahead  NEW YORK/SAN FRANCISCO (Reuters) - Google Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=GOOG.OQ target=/stocks/quickinfo/fullquote"&gt;GOOG.OQ&lt;/A&gt; on  Wednesday got the green light to go ahead with a downsized  version of its much-hyped initial public offering, meaning its  shares could debut on Nasdaq as soon as Thursday.