It's 4 a.m. and I wanted to see what these would look like more recessed. So I did a VERY quick Photoshop.
Links:
http://theonlyoneleft.googlepages.com/recessed1.jpg
http://theonlyoneleft.googlepages.com/recessed2.jpg
Oh and I think they look awesome, man. A cool mod I definitely hadn't thought of. Love the blacked-out look.