In addition, it can easily be used as LYNC status indicator, this project extends the available blink (1) SysBarCTRL easily modify :-)
When the ThingM.Blink1 Dot .NET library as the Linux adapts to both sides can anstueren separately and distinguish "DND" of "Busy". So I have the typical DND of Lync Rot-Weiss and the Free-Idle as a "yellow-green" can represent.
It is a nice gadget, although not particular cheap, but compared to other Lync status indicators but Preiss cheaper (if you must have someone).