Shame they never communicated much about what happened. Here is video of Kris mentioning hack: https://youtu.be/It-SMzZaPuo?t=1478
I referenced the addresses used in the hack here:
https://bitcointalk.org/index.php?action=profile;u=166931;sa=showPosts
They are:
https://blockchain.info/address/1LuG91tcSQxKj32BsCoRkX7yQLfj9LtkCs
https://blockchain.info/address/1HpwmCt8LE6uA6gMDowMiYAFjqAa5BNrzg