With the Telerik Q2 release the Silverlight team releases the Beta version of the Rad Controls for Silverlight2.
The controls are separated in 4 different assemblies:
Telerik.Windows.Controls.Navigation
- Window, Menu, TreeView, TabControl, PanelBar, Cube
Telerik.Windows.Controls.Input
- ComboBox, Upload, Calendar, DatePicker, NumericUpDown
Telerik.Windows.Controls.MediaPlayer
- MediaPlayer.
Telerik.Windows.Controls
- Range Slider, ProgressBar, WrapPanel, DockPanel, UniformGridPanel
What is the current status of the suite and where we are heading to?
All of the controls are fully featured and extensively tested. We released two CTP versions of the controls before the current "Beta 1". We have got a lot of feedback from the community (a big THANKS! for that - keep it coming!)

I hope this gives you a better idea about where we are now and what to expect from us in the next couple of months.
Go download the controls now and give us your feedback!