Thank you Sol for the instructve and invitational text.
I apologize for repeating a previous post, but there is also
currently a debate on mail art going on at boek861 web site.
This site has web archive also of mail art, zines, links, calls,
galleries
I would very highly recommend it.
http://www.fut.es/~boek861
this site also has much on visual poetry
the phi.lu site Sol mentioned is also excellent, and those which
Ruud does--
the best way to learn of mail art is to participate
--dave baptiste chirot