[UPDATE: It's back, as of 2 July.]
DC Beer, the on-line discussion group for good beer in the DC/Baltimore/Richmond area, is temporarily off-line.
Here's a comment from its moderator, Dan Brown, who maintains the site on his own time and on his own nickel:
Brauhaus.org has suffered a disk failure. I am working to restore from backups. Please expect that things may take a bit of time to fully get back online. Dan.