I would love to add support for additional third-party analysis tools, but unfortunately we need to devote our efforts to those tools that are in the highest demand. While we currently have no plans to create a ReportBuilder add-on for OpenOffice Calc, we are evaluating the market demands on a regular basis to see where we should be focusing our efforts. However, our ReportBuilder is based completely on the Reporting API, and so if our awesome community wants to create their own add-on for OpenOffice, the access and endpoints are there for anyone with the initiative!
