Fla. Businessman Sues Ex-NYSE Director  MIAMI (Reuters) - A Florida businessman has sued former New  York Stock Exchange director Kenneth Langone for \$1.8 billion,  claiming he made false statements about data management company  Seisint in hopes that ChoicePoint Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=CPS.N target=/stocks/quickinfo/fullquote"&gt;CPS.N&lt;/A&gt; could buy it for  a low price.