Apparently the first assumption is that the DDoS attack initiated major hardware failure, and wiped out the file system on all the servers.
http://www.reddit.com/r/Bitcoin/comments/1qo6cj/bips_being_ddosed/

Status:
We are propagating new servers and restoring backup onto those now.
Current estimate for online status is within the hour. We are waiting on the blockchain to download for our bitcoind's

Our Contingency Planning and Disaster Recovery Plan:

Our future contingency planning will include backing up the blockchain for better risk management like in this case, where it has catastrophic consequences that we are not able to deploy backup within minutes, but have to wait 5 - 9 hours for the blockchain to download. (we are at "blocks" : 269439)

Personally I am sorry for any inconvenience, this might cause.