Several other users have asked for the ability to hide the taskbar button or Dock icon. Currently, iCamSource doesn't have that feature, but there are several 3rd party programs available to hide taskbar buttons and Dock icons.
For Mac, a well known program to hide Dock icons is called "Dockless". I've only tried it once, but it worked fine that time.
On Windows, there are a ton of utilities for hiding taskbar buttons. I haven't used any of them myself, but from searching around for a free utility that supported both XP and Vista, I found "Hide Window Hotkey" by Elongsoft and "TaskbarControl" by Pointstone. There are plenty of other ones, free and paid.
I hope that answers your question.