Add RotationAngle property so series item labels can be rotated wih C# / VB.NET code.
Add more google financial style features so the zoom control can be overlayed on a chart. http://www.google.com/finance?q=INDEXDJX:.DJI,INDEXSP:.INX,INDEXNASDAQ:.IXIC
In some scenarios you have to graph some non-linear functions, e.g. exponential, 1/y. It would be nice if there were integrated support how to specify this.