My gmail account was hacked today. I have about 100 emails and messages so far from people who received a bogus email supposedly from my email address. In fact the email comes from Turkey. Please be assured I have no virus on my computer - I have a Mac, they rarely pick up viruses. I've changed my password but I would imagine that the hacker has my address book. There are over a 1000 email addresses in there.
I apologise if you're received one of these emails. Don't reply to the email, just delete it.