Microsoft today outlined some finer points for testing business intelligence capabilities in the Excel 2013 and SharePoint 2013 previews.

Making Power BI Reports Available in SharePoint Online A close look at Microsoft's new Power BI Web Part, currently in preview, which expands your ability to publish and share Power BI data.

Designed to support the needs of the BI analyst, or power user, it offers connections to some tools you are already using everyday. SQL Server 2008 R2 BI Solution Stack PowerPivot for Excel ...

These allow you to connect with data that exists within a SharePoint list, Excel Services Document or SQL Server Analysis Services data.

Microsoft's most recent release of its Excel 2013 and SharePoint 2013 previews are designed to show off their BI capabilities.

AtScale now natively supports Data Analysis Expressions (DAX), enabling Microsoft Power BI to connect to AtScale.