I haven't received one, but someone mentioned in another thread that there is a thread going on in the Agora forums trying to decipher who might be the son of a bitch who sent this out. My suggestion is that anyone who has received this letter should go to that thread (if you have a link to the thread, can you please provide here!). The more people who go and help triangulate this bastard, the quicker this person will be uncovered. Just a suggestion that I thought might be helpful.
Best idea. Thanks for posting this.
Blackmailers are some of the worst people.