I'm settling into my new job with IBM this week, working on Mozilla full-time :-)
Well, unfortunately I just haven't had the time to wrap up the DNS rewrite in time for Mozilla 1.5. With any luck I'll land it early during 1.6 alpha, and maybe just maybe I'll put together a 1.5 final release with the DNS rewrite if there happens to be enough interest.
Also, for those trying to download the experimental builds, my web server is temporarily down. I hope to have it back up shortly.