Use JIRA's REST API to sync issues, worklogs, projects etc into SQL tables, enabling you to point your favourite BI tool at the data. I highly recommend Tableau (http://www.tableausoftware.com).
MixDEM a web based ETL tools meant for Web integration, Data transformation and Mashup edition. It include MixDEM ETL Engine created using ZEND Framework, and MixDEM GUI Editor an AJAX IDE that enable developers to quickly and easily create applications.