same has happened to me, my account has been hijacked over this weekend
i posted about it here
https://bitcointalk.org/index.php?topic=2183869.0The page that i posted a BoostCoin address on which i can sign is archive here in case it gets deleted
http://archive.is/Rw3WrI've also PM'd Theymos and Cyrus but havent had any reply yet. What else can i do to get my account recovered?
I've tagged it with negative trust but signing a message from that address would help verify your claim in the meantime.