Yesterday, the site was down for about half a day, at least for me. And today, it's been up and down. Appears to maybe be some kind of DNS issue, saying it can't find the host.
Some server changes or something that needs to propagate across DNS?
We are aware of the situation and we are working on resolving the issue. The notification emails issue has been resolved, and we are working on the site issues, but for the next few days we will still be having some downtime.