There are quite a few bi tools that do pretty much what you're describing on the ipad and other mobile devices now. Share a link, pulls up an interactive dashboard for everyone that they can play with and discuss in the meeting. Many also let you build a slide deck in PowerPoint with interactive dashboards on each slide.

Now if you could have the ppt (or whatever) allow attendees to collaboratively interact with the current dashboard slide then you'd really have something.

Maybe I should get to work on that!