I don't miss a physical keyboard when I want to text "Did you feed the dogs?" messages. Swype and voice input work better.
But anything much longer than that involves editing, which is really hard to do without chorded key combinations such as shift-select with arrow keys and mod+x/c/v/z for cut/copy/paste/undo.
The web browser and photo browser make good use of multi-touch. Why isn't there a keyboard alternative that uses it for chorded input?