Maud Newton says you can do something similar on an iPad, but only with your finger. I still write poetry (but not much prose) the old-fashioned way, as you can see. Brain activity seems to lend itself nicely to having every thought recorded in a whirlwind of ink. So take that, Mr. Jobs.
(I should add that I am grateful to my computer for being able to upload a handwritten manuscript and make it visible on the Internet via something called a “blog.”)