I just came across these letterpress note cards today. Nice simple 'typewriter style' font on a slightly textured off-white paper, black on white, lovely. No bells and whistles taking your eye of the actual message here. These cards were produced by Sapling Press as a collaboration with Dear Blank, Please Blank , which is a great place to go and waste a little time for when you want a quick laugh. More examples of the cards can be found on a link at the bottom of this post.
more examples of this range of letterpress notes here