>A Hitchhiker's Guide to type theory (and all the other alien things my eyes
>glaze over at on this list) aimed at the unwashed masses would go a long
>way to making OCaml (and functional programming in general) more
>accessible.  Did I pass over one somewhere?

I think by "type theory" you mean the type systems used in modern 
programming languages. Luca Cardelli has written some nice 
tutorial/survey on this topic.

See <http://www.luca.demon.co.uk/Bibliography.html>. Look for the 
articles "Typeful programming" and "Type systems".

Cheers,
Hao-yang Wang
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