Focus on controls.  They will build controls for Silverlight and WPF.  Ship with source, unit tests and samples.  Delivery is through codeplex.  Controls are released into various quality bands.

Silverlight controls toolkit just released.

Charting controls had a lot of help from Dundas.

Charting controls work very nicely on ObservableCollection.  Chart Builder App is cool.

Check out the charting example for Contoso.

Demo some of all the controls is at:
charts: http://silverlight.net/samples/sl2/toolkitchartsamples/run/default.html
controls: http://silverlight.net/samples/sl2/toolkitcontrolsamples/run/default.html