It’s nice that the site points you to the jive site for a feature tour. What would be better though, if I could actually find anything at all about ‘Spark’ on the Jive website other than a link back to this site.
You can check out http://www.igniterealtime.org/projects/spark/index.jsp for screenshots and some information about what Spark can do.
You can also see the User Guide at the following link: