incrediBILL - 1:01 am on Nov 1, 2012 (gmt 0) [edited by: incrediBILL at 1:04 am (utc) on Nov 1, 2012]
If you still have your membership list I would suggest that if you could restore the software and send out a request to people to upload the content again.
FYI, while doing offline terabyte backups aren't practical you could back up offline incrementally by only downloading what has changed on a daily basis. I do 'yesterday' backups to my local machine daily and can start restoring to a new server in a moments notice. Not that it will help the current situation but moving forward it can be done to avoid being so vulnerable in the future.
[edited by: incrediBILL at 1:04 am (utc) on Nov 1, 2012]