Thank you for writing.
This is a good idea and it will be a nice addition to our controls capabilities. I have added this feature request to our Public Issue Tracking System. You can follow its progress on the following link: PITS Feature Request.
I have also updated your telerik points for the good idea.
the Telerik team
Q1’11 SP1 of RadControls for WinForms is available for download
; also available is the Q2'11 Roadmap
for Telerik Windows Forms controls.