I agree, I think it's mostly just what the admins are getting themselves. There's a way to submit emails [1], but maybe the best model is to be the hacker news of email design (open submission, upvotes etc).
Comments and voting and community features are really hard to pull off. You can't just throw an up vote button and wait for good stuff to float to the top.
[1] http://reallygoodemails.com/contact/