NYC is running on generator power (Because of Sandy) so we decided to kick things over to our secondary datacenter in Corvallis, OR. With our tests this happens in about 5 minutes, but we had a scheduled index reorg which we didn't account for. That caused 40 GBytes that had to be synced across the country, so we had to run SO in read only for a little over an hour.
"This site is currently in read-only mode; we’ll return with full functionality soon."
Where are you? I'm in Vermont and only getting as far as "Server not found."