My concern, of course, isn't that it was just ME that received the e-mail but "all of my friends." Of course, I have no idea where Avast gets the contact information, so it either went out to no one (some of my address books are empty), or to an embarrassingly long list of people.
I'd like to hear from Avast where it pulls this information from, because I'd like to make sure I know who it was sent to.