Hacker mixed BurtW's tags, that was all.
You are a very bitcoin/nxt/scripting savvy person, you should know that.
I didn't look into this situation in much depth at all but had noticed the mixing service itself making a statement (which I thought referred to a lot more than just some tags).
So the hacker has only mixed a small % of the coins? Is that the 4.62 BTC that had been sent?
The 36 days still seems rather fishy to me though.