I received one of these from Newegg today, unfortunately it's going back.
Primary reason being that it does not have 6 key rollover. If I hold down S and X, and then try to press A or D, the third key is completely ignored. I tested the rollover on 2 windows boxes, and 1 linux box, all with the same results.
Other thoughts:
I was expecting it to be at least a little clicky, but it's nearly silent, it feels nice to type on though.
It definately does not work with a PS/2 converter, I tried 2.
It felt pretty solidly constructed, and had some heft to it, I doubt it would be sliding around on the desk too much.
It has a fancy cable, but it's a little short. 2-3 feet longer would've been better.
I may try a white alps Filco next. I'd prefer a 104, but the tenkeyless seem to be more readily available. Or maybe a black alps Filco, I didn't find the lack of click nearly as annoying as I'd have thought it would be.