Brian, this is wood type (the bottom type is lead) that's probably at least 70 years old. I buy it whenever I can find it for a good price. I also borrow some occasionally from an old printer friend of mine. In some of my posters I use handcut type also.
Sometimes. Sometimes I make a more temporary, cheaper, easier to destroy plate as in the case of this one. The images are thin foam rubber mounted type high on particle board. Basically a big rubber stamp. The kind of thing that makes FINE letterpress printers cringe and call me "the evil one". Here's one that was linoleum http://www.gigposters.com/posters.php?poster=15003