Coming from a Motorola Q, which I still have, and a brief stint with the Droid (which I actually liked typing on, either holding it in the air, or more so by lying it on a table) its not so much having to use the Fn key for numbers, as much as its a problem that they are aligned in a row, instead of "keypad" layout...for me anyway. I think it would be better served with a 4th row, for numbers and whatever is left over for symbols/functions.

The physical keys however, as far as size, spacing, and shape, are more than fine, and would be a great addition on something like the Droid.