It's a word cloud: a piece of text is analysed and the words therein presented varying in size according to the number of times each word is used. There's a free tool for making them called Wordle (http://www.wordle.net/). You can customise fonts, colours, and shapes. Output formats available include PDF.
Check out Wordalizer script by Indiscripts:
http://www.indiscripts.com/category/projects/Wordalizer
HTH.
--
Marijan (tomaxxi)
North America
Europe, Middle East and Africa
Asia Pacific