I don't know what these are called. Bumps? Bars? Nubs? Fnords?
 
I mean the little raised bumps usually located on the homekeys and the Numpad 5.
 
Well, I think I'd prefer having them on all of my homekeys, not just FJ or DK or whatever. And having one on my down-arrow key would be nice. Maybe I'd like to place 'em on my 1 and 0 keys, or every even-number or whatever (yeah, I'm still weak on touch typing top row numbers after years and years; Numpad is where it's really at). Maybe I'd even like different shapes/types, lol.
 
1) So what are these tactile-haptic thingies properly called?
2) Is there any real "official" specification which describes their use? They didn't exist in my learning-to-type (on a selectric) days.
3) Can blank keycaps typically be ordered with or without them, as desired? Or do you just get what they give you?
4) Does anyone have any sort of "add keycap bumpies" mod?

I don't know what these are called. Bumps? Bars? Nubs?

I felt such a sense of unease after reading that sentence. Not sure why...

Could it have been the "Fnords" at the end that made you uneasy?
lol

Hmmm.  I don't like the look of those things.
 
The countersunk pinhead mod looks worthy.  I'm going to try out a variation of welly's velcro mod and braille-inspired stickercaps.  I found things like this, order by the sheet to cut up as desired.

Pshaw!  Number rows are obsoleted.  Leftover Qwerty madness.  Ain't much good for anything beyond switching weapons.
 
Numpad is faster, easier, better, sexier, excellenter.
 
If the numpad - along with the cursor/edit keys - were leftsided on the keyboard it would be perfection, given right-handed mouse use.
 
(Yeah, I know about Zboards and "modular" Microsoft boards ... this one cool feature is just not enough to outweigh their combined ****ness, so I'll keep waiting and hoping for a perfect keyboard product.)

Oh my ... what is that?

Bleh. Futuba switches. Had those on some ancient Datatrain keyboard that I always hated, I mean I really hated that piece o shyte ... keys were too stiff, tactile clickety-point felt like the "wrong" place, and the keys pushed up way too aggresively. Kinda loud too, didn't bug me but didn't make me popular at home/work.
 
I'm gonna wiki around, see if these icky switches can be cherried. If so, and if the Sejin has decent NKRO then I'll grab one. Form factor looks almost ideal.  (I personally prefer big backspace/backslash keys over L-shaped enter, easier for coding.)

There is that modular cherry switched Mac keyboard.  I don't see the keypad there at fentek, but DSI sells them with the other modular pieces (like numberpads).  I think I'd contact either place, before placing an order, to get specifics on what pieces are available with what switches, etc.