Cuboo is promoting openBI : Business Intelligence based on open source software.
His last post gives an example of how Palo, Excel and Sparklines for Excel can be used to create dashboards.
Not only Palo is a powerfull open-source database and Olap server, it also provides a great add-in, that allows users to easily embed pivot-table in Excel... very powerfull indeed.
The last step is to integrate sparklines for quick and efficient visualization.
Here is his article : “Pimp my spreadsheet” with Palo, and a screenshot of a dashboard using Sparklines for Excel.