Register.com is apparently the recipient of either a denial-of-service attack on some of its DNS servers, or a colossal screw-up by one of their sysadmins. This means that a lot of web sites — any registered with them — will probably be temporarily unavailable until they can rectify the situation.
That includes mine.
Sorry for the downtime. My server is fine, the web sites are fine, it’s just the name lookup service that’s messed up.
–Matt B.