We've had a couple outages the past 24 hours. One was last night for about 2 hours and today for another 4 hours or so. I've been battling a combination of hardware and OS issues. No data has been lost and I'm in the process of performing a full backup of everything (database and websites are backed up nightly). Things should be stable for the time being but I expect to take another outage sometime this weekend to fully correct the root cause.
Sorry about the inconvenience. I'll be issuing refunds per the non-existent SLA.