I have been using the Oracle BI tools for years now, currently with Oracle Sales Cloud, earlier with Oracle CRM On Demand and initially with the Oracle ERP solutions like eBusiness Suite and PeopleSoft.
I will how I share as much as I know on the Oracle BI tools and how I use them with the Oracle Applications.
I will use Oracle Sales Cloud to build my examples in, but these techniques are off course applicable to other Oracle and non-Oracle applications that use the Oracle BI tools