Looks interesting, but does it offer any unique features that set it apart from other such languages like JSON, XML, etc.? I see that matrix example, but is it any different from an array? (I couldn't tell from reading the docs.)
JSON especially is incredibly human read/writeable and its relative lack of ambiguity is nearly unparalleled., and it's syntax is minicule. YAML is particularly bad in this regard. XML is usually pretty humanly readable, editable too, and has many fewer of the issues around ambiguity, but I sympathize with the sentiment since it can get's out of hand much more readily.