Although there are still a lot of typewriters on the market, mashable (a technology news source) & others are reporting that Godrej and Boyce, the last remaining manufacturer of typewriters, has shut down production

http://mashable.com/2011/04/26/rip-typewriter/

More here:
http://tinyurl.com/3cefhtg

A history of typewriters and key layouts

(…and I keep reading that keyboards are on the way out, too)