We want to know what you value (or don't) about email.
Please comment below, or do our quick survey: http://bit.ly/T088MN
I am happy to take questions or feedback via: joel AT joel marsh DOT com.
Edit: I'd also like to second DanBC's comment about super easy encryption. Having a diagram to indicate which parts of the transmission are secure would be great, too. (For instance, visually display that the email is mainly secure during transit, but is still plainly viewable by the recipient's email server.)
* Very simple, very easy, almost idiot proof anonymous email.
Taking a quick look at the GPG page we find some mentions of this:
(http://www.gnupg.org/faq/GnuPG-FAQ.html#sec-8) ('Advanced topics'!)
(http://www.dewinter.com/gnupg_howto/english/GPGMiniHowto-1.h...) (mini how to in English, they have other languages available).
(http://www.dewinter.com/gnupg_howto/english/GPGMiniHowto-5.h...) Signing and checking signatures.
Just from these short snippets you can see that there is a lot of documentation for GPG; and that installing and using GPG will be beyond most users.
 Importantly it is crypto, and thus it's trivially easy for users to get this stuff wrong. Small mistakes do not necessarily mean anything visible to the user. The output could look real and useful, but actually be worthless.