Ok, let me just throw another thought out there for everyone to chew on: The attiny will need to be programmed by ISP (at least the first time, I guess? I'm not really good with firmware) - I've got the ISP pins brought out to pads on the edge of the board, and I suppose throwing together a jig to hand-jam a bunch of boards would work, but would be tiresome in bulk... anyone have any ideas how to handle this?
Especially with all of the different layouts people will want
...
(seriously, I'm not really good with firmware)
BTW, I ordered some prototypes yesterday, because I've never actually played with the ATTINY before so... probably need at least SOME testing first.
But hey, at least with only two switches and optional don't-solder-in-the-resistors-or-LEDs-if-you-don't-want-it backlighting it shouldn't be really hard to make sure it's working ok.