RadControls for ASP.NET AJAX
Q2 2010 release
Since Q2 2010 all new functionalities are listed in the control's Release Notes posted here.
What's New in RadListBox for ASP.NET AJAX Q1 SP1 2010 (Version Number 2010.1.415)
VS 2010/.NET 4 RTM support
Added: Option to loop through items starting with the pressed letter while the ListBox has focus
Added: Tooltips for all RadListBox buttons
Added: Enumeration allowing to specify which transfer and reorder buttons should be rendered
Added: MoveToTop and MoveToBottom buttons
Bug-fixes
What's New in RadListBox for ASP.NET AJAX Q1 2010 (Version Number 2010.1.309)
What's New in RadListBox for ASP.NET AJAX Q3 SP2 2009 (Version Number 2009.3.1314)
What's New in RadListBox for ASP.NET AJAX Q3 SP1 2009 (Version Number 2009.3.1208)
What's New in RadListBox for ASP.NET AJAX Q3 2009 (Version Number 2009.3.1103)
What's New in RadListBox for ASP.NET AJAX Q2 SP1 2009
Added new property - EmptyMessage. It lets you specify a string that will appear when the RadListBox contains no items
New RadListBox client-side method - insertItems(items) used for handling bulk insert of RadListBoxItems.
Bug-fixes
What's New in RadListBox for ASP.NET AJAX Q2 2009 (Version Number 2009.2.701)