Last week I participated in the Dynamics Summit 16 conference. I was able to help up on a panel answering questions about Power BI. I also presented at their community theater and a session about Power BI deployment options and security.
You can check out the Dynamics 365 keynote that ScottGu gave at Summit16.
For a quick overview of ways to embed Power BI see this video.
For information about Power BI pricing, see the pricing page.
For information about Custom Visuals within Power BI, see the visual gallery.