Oh whow. Thanks for pointing that out.
I am so confused, "Ultimate hacking keyboard" implies for me that you're a hardcore vim user.
How can this have been developed without an ESC key?
(I don't have a UHK and though I looked before I don't think it's for me, just saying.)
The function keys are a bit more of a pain, but once again it's a thumb press + number (1->F1 etc). I'm more inconvenienced by eclipse and visual studio not having the same button for debug-step-over than actually pushing the thing.
I'd miss FX keys too, I use them a lot in window manager desktop switching.