I also reported a problem yesterday with a MySQL database that was added to flipper:sprung. The control panel shows that an IP has been assigned to my MySQL hostname and that status=active, however, an nslookup to all 3 DreamHost DNS servers gives the error message, e.g.,
** server can't find [mysqlhostname].[mydomain].com: NXDOMAIN
My other MySQL databases on different servers work fine.