I'm waiting for the caps to finish drying from the cleaning, but I wanted to post some preliminary shots of my mystery board.  I got this in yesterday.  I was fairly sure I knew the switch, but not 100% until I popped that cap and confirmed it.
Crappy eBay pic of the board:

Now for the guts.  Since I could clean the board without soaking it in water, I can get pics.
Obligatory PCB shot:

And the reveal:

I guessed right, Fujitsu Leaf Spring.  These happen to be the Clicky Second Gen switches.  I'm probably going to try and get a Soarer's mod going on it and then list it since it's too light and way too loud for me.  If you like clicky switches, this is crazy clicky, but with a fairly small tactile bump to it toward the bottom of the switch.