Adding interactive visual syntax to textual code:

That's cool... Though in this example, it's not really needed to insert the visuals in the code, as the unit tests could have been written as data files, editable in an external editor outside of the development environment. The glue code bringing the test files together is probably always the same: start from this position, play this move, check that the result is correct. But for more complex examples, having IDE support might be a killer feature!

Damn I've been scooped :D super cool though