Back in 2007 I wrote about the 22Pop -- a typewriter for sending e-mail. Alas, it was an art project and not a production item. However Monday, Mary Kowal Robinette maryrobinette wrote about the USB Typewriter. It's a real typewriter which is rather simply wired so as to become a USB keyboard.
Ingenious and so very cool.
This is different than, say, the steampunk-ish keyboards which take a computer keyboard and encase it with a new metal shell and old typewriter keys. Those, too, are very cool -- and I'm too much of a klutz to make my own. (grin) The USB Typewriter is still a functioning typewriter and doesn't involve cutting the keys off it to remake a computer keyboard.
For a couple hundred dollars I could take my Royal portable and make it into a keyboard. Maybe someday I will. (grin)