It has been down since at least 0215 UTC (9:15 pm CDT).
Quoting the SETI Server Status page,
Data Server Status
The data server process is not running
Right now the data server machine is up, but the process that actually serves the data is not running. This is probably because we're in the middle of upgrading the server software, or preparing for a quick reboot. These outages are usually brief (10-15 minutes). Please try back again soon.
Don't worry, it'll be back soon.
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I am an evolutionist, and they can have my opposable thumb when they pry it from my cold dead hand.