This does not mean foobar is live again quite yet!
The drive is mounted read-only for the moment (though everyone can get to their files again). The RAID partition is being backed up offline to another machine. At that point, foobar will be taken down again and the RAID partition destroyed and reconfigured clean, and then all the data copied back. I am /also/ looking into how to set up an automated off-site backup for the ungodly amount of data we have. Everything will be live again before too long, however...and the machine /did/ come through intact.
Everyone owes David big, big thanks. If you're female and in the Silver Springs area of Maryland, I suggest a date or something as thank you to him! :)