Hi,
first, I'm in Italy.
Hacker mail came from a fake address: <corey tailor dball@cdsbmi.com>.
He simply tell me "I known your password: 'xxxxxxxx', I've infected your computer and recorded you while watching ****o, give me xxx Euro to ..." etc etc.
Usually i discharge these mail, but "xxxxxx" is the password of my d-link account to access this forum, and then the information "I known your password" is true.
I've used this password also in other 3 forum and then I'm not sure from which one he has got my password, but surely he got it.
I've told you this to informe that it is possible, but not sure, that your site was cracked.
Carlo