When I was a little girl in the 70's I used to steal Dad's Letraset type transfers to make my drawings/walls/dollshouse walls look like 'real' magazines and posters (well that was the idea anyway!) - Letraset was messy, inaccurate, nerve-wracking, you always ran out of the letters you wanted...and I loved it! Here's a few Letraset bits I've found, see more in my 'Letraset Love' Gallery on flickr - http://www.flickr.com/photos/kathykavan/galleries/72157623910954053/#photo_21...
Project Letraset - loads of pictogram sheets http://www.flickr.com/photos/casi_famoso/sets/72157600170310844/
A treasure trove of Letraset transfers - http://www.flickr.com/photos/toby___/sets/72157606830886448/
Letraset catalogue, Berlintypes collection blog post - http://jetstreamprojector.wordpress.com/2009/08/02/berlintypes-collection/
A Time before Mac blog post - http://oddsandendsblog.com/2009/04/02/a-time-before-mac/
Fontastic - http://paigeandmodern.com/2009/04/17/fontastic/
Letraset wiki page - http://en.wikipedia.org/wiki/Letraset