Our Web hosting provider, The Planet, is generally pretty good - but they have significant struggles when it comes to DNS (Domain Name Servers). At least a couple of times a year, they'll have a complete failure with their DNS machines, and they always just shrug and say "We provide DNS as a courtesy for our customers, nothing more" - as if that's an excuse for not being able to offer a service that's reliable. That's what happened today - they had a complete DNS failure, so all of our sites (and thousands of others) were taken completely offline. We're going to take steps to help prevent this in the future.