Details on what Lightstreamer exactly did to pass the 2008 InteropFest are available from the official Openajax Alliance wiki: http://www.openajax.org/member/wiki/2008_InteropFest

The 2008 InteropFest requirements are very clear and I don't see much space for arbitrariness here. In particular, Lightstreamer made publicly available a zip file containing the OpenAjax Metadata for its Web Client library.