Just received some aluminum faceplates for my arduinome that I got through a group buy organized by @z15 on the monome community forum. (Thanks!)
These aluminum panels are each 5 mm thick which leaves about 2 mm of the SparkFun buttons exposed. My initial test of the faceplate has resulted in a lot of the buttons getting stuck, though most of them not enough to actually make contact. I think that with some time put into smoothing out the button holes and edges that this will provide great button mashing action.
Here is another view:
and another:
I just can’t get enough glory shots of blinky button grids!



