It is imperative to understand that everything was wiped out from our servers and getting functionality back is priority #1.
The wallet part of BIPS was a free service to make payments easier for users.
Web Wallets are like a regular wallet that you carry cash in and not meant to keep large amounts in.
Hence we offered a paper wallet as a cold storage alternative for those who wanted a safe storage solution.
We will be contacting all affected users as already proclaimed.
We will need their consent to hand over information to the authorities for further investigation, which hopefully can assist in catching the thief.
Those who were not affected and have a bitcoin balance will also be contacted.
Most balances left are minuscule, but if you had more than a few satoshi’s in your wallet you are affected, and will be contacted.

Another priority is doing forensics data recovery to be able to investigate and assist authorities in finding the attacker.
Technical information will not be disclosed for security reasons.

Stolen coins have been isolated and server logs have been retrieved from data recovery:
https://blockchain.info/address/1LuG91tcSQxKj32BsCoRkX7yQLfj9LtkCs

Please be advised that attacks are not isolated to us and if you are storing larger amounts of coins with any third party you may want to find alternative storage solutions as soon as possible, preferably cold storage if you do not need immediate access to those coins:
www.coindesk.com/hacker-attack-polands-bitcoin-exchange/
www.coindesk.com/czech-bitcoin-exchange-bitcash-cz-hacked-4000-user-wallets-emptied/