Silverlight .NET Controls V2.7 Released [February 10th, 2008]
With the release of version 2.7 we have included the Radio and RadioPlus controls, the RadioPlus being a radio button complete with a label text. There has also been significant changes to the ListBox and DropDown List controls which now have a universal standard mechanism for manipulating the items displayed.
Also enhancements have been made to the TreeView which now has a checkbox mode which allows individual nodes to have checkboxes displayed, this allows for multi-selection support in your Silverlight .NET applications.