We are starting beta tests of DiagramLite 1.4. The new features are:

TreeView nodes
The TreeViewNode class represents nodes that can display hierarchical data. The root items displayed in the node can be accessed through the RootItems property. New items can be added to and removed from the returned collection. The root items can have child items on their own and so on. For more information, refer to the TreeViewItem class.

Link auto-snapping
Now links can automatically connect to the nearest diagram node without the mouse pointer reaching the node. This is enabled by setting the AutoSnapLinks property. The maximum distance at which auto-snap works can be specified through AutoSnapDistance.

Miscellaneous
~ The GetLinkAt method returns a DiagramLink located at the specified point.
~ GetNearestNode returns the node nearest to the specified point.
~ InplaceEditCancelOnEsc property added.
~ Granularity and TurnCost properties added to QuickRouter.
~ HyperLink property added to DiagramItem.

If anyone is interested in trying the beta, please download this archive, which includes updated assemblies and help file:
https://mindfusion.eu/_beta/diagramming.silverlight.1.4.zip