This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
You use jsp:param with jsp:include and jsp:forward to add extra parameters to the servlet request. Those extra parameters are only available in the included / forwarded servlet / JSP page; after the jsp:include / jsp:forward end tag the parameters are no longer there.