Good news, we have news from the pkgbeta.FreeBSD.org server:
pkg bootstrap is being restored. Stay tuned.
Updated: 2012-11-28 10:20 UTC.
The site went down shortly after I wrote my pkgng FreeBSD Handbook post, ironically enough. I was going to post in the newsgroups asking what was up, but now we have news.
UPDATE: We now have a new message.
Currently this site only contains pkg bootstrap files!
Updated: 2012-11-28 11:30 UTC.