Both. Chris mentioned not just one.

Let me know if you need a copy of emails :)

I've been actively using the account for other purpose than tweeting, and had a vague plan to start using it for tweeting again. Should I have mentioned the plan publicly so that the attacker would have refrained from blackmailing me? I don't think so.

Nope. A week ago when I explained the situation, Twitter seemed to think I just gave it up, willingly or not.

Man that sucks, sorry to hear it. I guess on the bright side, you didn't have your entire online identity destroyed which was possible given the attacker had your email.