Just incase you wanted to see the Cyan version of the Lumia 920 Unboxed and looked at here is a video. It was bought online when pre-orders went live. The AT&T corporate stores did not have this color and for now I think it is exclusive to online and Microsoft Stores only.
Nokia Lumia 920 Cyan Unboxing and First Review - YouTube
Nokia Lumia 920 Cyan Unboxing and First Review - YouTube