Hello again UnitSeven
We have just released an update for wade that includes the event you need :)
You should now be able to select your isometric object and go to the functions tab. In the drop down list of functions, you should now be able to see a function called onIsoTileChange
This function is triggered every time the object enters a different cell, even if it's just passing through and not stopping. This event handler recieves a data object that contains 2 properties, previousTile and currentTile
I suggest you console log the data value inside the handler to see what it contains but the important bit is both previousTile and currentTile have an x and z value which represents the tile co-ordinates.
Hopefully this makes your task easier. If you have any questions please respond to this post :)