The buildbot is alive and well and has been finding real problems of various sorts roughly once a day for some time. I'm not spending much time on it anymore, just watching and tweaking occasionally.
The number of spurious failures is tapering off as I slowly expand the blacklist and polish up the scripts. I plan to turn on email notifications to wine-devel once there have been no spurious failure reports for five days, probably sometime in October.
http://wiki.winehq.org/BuildBot is up to date in case anyone's interested in details.