Pentaho's BI stack is being used by our entire company. We use their tooling for ETL, delivering reports, and as a sort of end-point for a custom web app that we've built. The end point uses xaction and Mondrian to deliver data to our front end. We also make use of the community edition of the BI server--this houses several reports that our analyst team has built as well as resources necessary to support our custom app. In the near future we'll also be using the tool's big data plugins to ingest data into our data warehouse from hive/hadoop.