Angular Gauges such as the ones on http://www.fusioncharts.com/widgets/gallery.asp (in the top group).
This would allow people to writing financial systems or any kind of alert type of systems to monitor how far away they are from a goal or how close they are to triggering alerts.
Prime example is in the financial world: You set a Budget of $100,000 with a $20,000 threshold for a project, the gauge stays in the Green zone when spendings are below 100k, when its between 100 and 120 it is in the yellow zone (e.g. time to be concerned) and above 120k it would hit the red zone and all hands on deck.
That´s just one example of how useful that would be.
Completed as of Highcharts 2.3
We want to buy the library but we need the gauge graph. When do you thing that the gauge chart will be ready?
Yes, various dials are important for dashboards to display KPIs - including angular 'speedometers' as well as 'sliding' (left to right) gauges
Once version 2.0 is released with the SVG rendering and export capabilities, focus will be on developing more chart types. Angular gauges is one of these.