: Well, I haven't switched back to mutt - yet... but it might be of interest that you can use the open
command to open just about any file that a GUI app is registered to handle. All you need to do is make sure attachments are saved with a proper extension before you try and view them and it should Just Work.
I do miss using Vim for everything, anyone know if it's possible to rig textfields in OS X to act like Vim instead of emacs? :)