Reaping the Benefits of Next Generation Dashboards is a free white paper from SAP that talks about the benefits of making analytics more visual through using business intelligence dashboards.
I have seen dashboards take a life of their own for developers. To those that want to start with the basic metrics to those that want to see every metric within an organization. Dashboards are only a part of the business intelligence storytelling, and for the most part they are the cover of the story. I always suggest to my developers to make the dashboard the 30,000 foot view, not the detail level view. If a user wants that, have them be linked to a report that gives that detail.