0: http://www.amazon.com/Filco-Majestouch-2-Tenkeyless-FKBN87M-...
I can see it's handy for some people (like most people like an actual mouse) but I do see the OP his point; at least here most shops carry mostly laptops with numpads and they are not an option. The choices are heavily limited because of this.
This isn't true for the vast majority of people, because they don't enter enough numbers for it to make sense. Moreover, if you learn how to touchtype the number keys above the letter keys, it's actually not that much slower than using the numpad.
I prefer add-on USB numpads, because I'm left handed and etc. But still, numpads are great and you only really appreciate how good they are when you have to type out a stupid list.
Very few, and if I did, I would get an add-on numpad. Chances are, I wouldn't be continuously entering numbers - there would be times when I needed to enter a lot, and times when I didn't need to enter that many. Having an add-on numpad would let me move it out of the way when I didn't need it.
In fact, even though I'm right-handed, I would try to learn to enter numbers left-handed, because it would be great to be able to put the numpad on the left side of the keyboard, thereby solving the distance-to-mouse problem.
But my basic point is that numpads are not needed by the majority of computer users, as evidenced by the popularity of laptops that don't have numpads (ironically, unlike the linked article suggests, I actually haven't seen that many PC laptops with numpads).
You'd think so, but muscle memory is very powerful. If you're accustomed to a number pad and are typing an e-mail that contains just one reference to a number ( 2.388 ) the default action is still to try to type it on the num pad.
Using the top-row of numeric keys whilst tapping the decimal with the little finger is very slow and awkward by comparison and requires a context-change.
If you type for even an hour each day, you owe it to yourself to try out a mechanical keyboard...I'd never go back.