We're nearly wrapped up with 1.4alpha. I've spent a good part of the day getting my temporary machine configured to work with the mozilla.org docs tree. (Not that any of you could possibly care, but) it certainly is a lot easier to get a build environment set up on linux than windows and the only trouble I had was gettin apache configured for server-side includes. That part was necessary because our release notes, which I'm in the middle of updating for 1.4a, use includes for ease of sharing among vendors like Netscape who contribute to and consume that doc. I had a simple typo in httpd.conf that escaped my notice for an hour or so while I tried changing every other possible setting. Now that I've got it all set up I can finish off the release notes and move on to update the rest of the release documentation. If all goes well, we'll have a 1.4a ready for you shortly.
