Friends Ken, Oleg, and I have finished Version 2 of our paper "Fun with Type Functions", which gives a programmer's tour of what type functions are and how they are useful. http://haskell.org/haskellwiki/Simonpj/Talk:FunWithTypeFuns If you have a moment to look at, and wanted to help us improve it, the above link goes to a wiki page where you can comment on the paper or discuss it. We still have time to improve it. Thanks Simon