The on-line FreeDNS web service I use for my hosted domains has disappeared. Probably just a system hiccup on their end; their registration is good deep into 2010, but their systems (for which I could find IPs) don't respond to pings.

I hastily threw a zone for each of the hosted domains (including this one) onto my own DNS server and changed all of the domain registrations to use it as their first choice. Hopefully propagation will be fast and disruption will be small.