pretty sure the 100-10L device is a capacitor, not a zener diode. It's also labelled C108A and C109 on the silkscreen. I'm not seeing D1 or D3 anywhere (though D2 is a pretty huge diode on teh far right.
In general: D -> diode R -> resistor C-> capacitor X (sometimes Y) -> crystal oscillator L -> inductor J -> jack (sometimes pin or jumper)
I was able to stalk-down that guy's
photobucket (this specific image is the last on page 5, you can see 2 more on p6) and find the device, an xk3y. still looking for better photos of the PCB.
on google images, I see at least three different revisions of the PCB as well as a not inconsiderable number of fakes and knockoffs. SOme of the best photos from
here show a different revision than youy have linked as well as what appears to be the same PCB but with green sodlermask and different component selection. Notice how the C108 and C109 SMD are now SMD metal can capacitors (which are much taller and probably a little cheaper)
http://modcontrol.com/review/x360key/11.JPGhttp://modcontrol.com/review/x360key/28.JPG^looks hand soldered. Is this a prototype?