Silverlight control for visualizing events over time?

We are looking at implementing a Silverlight project to provide users with visualization of events over time and so I have started to look for a control that will let me do s开发者_JAVA技巧o. The inspiration for our project is a visualization The Guardian has done: http://www.guardian.co.uk/world/interactive/2011/mar/22/middle-east-protest-interactive-timeline

So, can anyone think of a control/project that will allow us to do something like this?

Not quite as visually impressive as the Guardian example, but there's a WPF & Silverlight Timeline Control on Codeplex.

The Microsoft Expression Gallery might also have some additional examples.