Base technology used: Apache Cocoon, Saxon, Apache Lucene, Lucene/SOLR, Apache HttpClient, Tomcat, Apache HTTPD, and many more. Data gets updated almost in real time, 50000 of new items added daily. Today: 350000, and it is only 10% of coverage. Someone wrote at TheServerSide that Cocoon is not a web application development framework... That's true! Consider nearest future: all is Transformation. We are going to hardware-based XSLT... Thanks