To-do list status:
Verify that mail handling hasn't been broken. (I put in Email::Send
instead of hardcoding the "sendmail" (exim) system call, and broke it. It
*should* be unbroken now.)
Finish up the profile/avatar maintenance screens. (Subscription mx
page is done, address mx is done except for confirming new
addresses. Uploading avatars is not working, but it's serving up avatars
manually put in the directory.)
Clean up the Javascript reply function stuff, including the WYSIWYG
editor. (Haven't touched this, so I'm still posting this by mail.)

