One of the key models of the new Power BI service is the open sourcing of the visualization engine and the ability for developers to build their own visualizations. As posted previously, the Power BI visualization framework has been open sourced and is available on GitHub. The visualization framework is based on D3.JS and can be extended to create new visualizations.
In order to encourage development of new and innovative visualizations, they have announced a new Power BI Custom Visualization contest.
The price for 1st place is $5,000 and the deadline is October 1, 2015. Good luck for anyone submitting an entry!