Famous correspondence in the public domain?

On Thursday in my Introduction to Rhetorical Studies class, we're going to be talking about Rationes dictandi, or Principles of Letter Writing: an excerpt of it, anyway, from The Rhetorical Tradition. I was thinking about famous letters to show in class, and Thomas Jefferson's letter to Benjamin Banneker came to mind, as well as the correspondence between Kenneth Burke and Malcolm Cowley, though it's dense and maybe not as well suited to a quick class exercise. Emily Dickinson's letters to Susan Huntington Gilbert Dickinson might be good.

Anyway, I was thinking that it would be anachronistically cool to take a collection of famous correspondence and reproduce it in two email accounts. Gmail might be good for the way it displays emails as conversations. You could create email addresses like, say, malcolm.cowley@gmail.com and symbolic.action@gmail.com. The letters could be typed out as emails, and the public could have access to the usernames and passwords to check the inboxes as new letters were added. I guess it would get vandalized and spammed pretty quickly, but it would be interesting for a while.