Bubble charts which can animate bubbles to show movement/size across time periods (Google analytics already do this). And to be able to output a flash animation of this report to place in PPT presentations
These are in GoogleDocs and I have seen a couple using Omniture data. Very powerful, not only cool.
Hi Tim, I do use bubble charts quite a lot although in my view the primary limitation of them is that, unless animated, they don't convey the performance of a data series over time. I think if this were changed to mirror the Google functionality that this would greatly increase their usage - especially if they could be exported into a power point slide...senior level management love this type of thing. I acknowledge the new Discover 2.9 bubble chart functionality if pretty good - but I think the animation piece plus export is needed to finish it off.
@James_wawne I agree that buble charts, unless animated, are much less dynamic with the data when looking at relationships between multiple entities over time. I have been having to try to do some in Google but that is a pain unless you are a developer. So, I have been having to do more of the Excel/LibreCalc backend manipulation of the vizualization.