Sorry, this happened last night when we were all asleep, and the way it happened caused our automated monitoring to not catch it (it's a DNS DDoS attack, so it's only affecting a percentage of users, not everyone).
Please see here: <a href="http://community.roll20.net/discussion/1664/current-downtime" rel="nofollow">http://community.roll20.net/discussion/1664/current-downtime</a>