For those of us who manage a lot of different properties (which means development inevitably includes the wrong embed code from time to time), having a built in variable or function to return the property name would be a huge help and, I would think, very easy to implement. Trying to match embed codes against multiple property definitions is a nightmare.
In our DTM implementation, I created data elements in each property called "dtmPropertyName" and could always do a getVar() on it to figure out which had been included on a page. That works, but I think it would be something a lot of people would use if it was a part of the product.