I made my own icon for Blender 3D (logo copyrighted by Blender Foundation) inspired from Token Icon Set by brsev - http://brsev.deviantart.com/ and share it for you guys here.
You can use it on your Docks and Windows 7 taskbar.
Convert it PNG to ICO here - http://converticon.com/
Download at http://nash88.deviantart.com/art/Token-Inspired-Blender-Icon-168315106