I've been getting a ton of people signing up for my GoDaddy hosted WordPress blog the last couple of days. All the email addresses were things like adfa@gmail.com.
Usually I get 2 or 3 signups a month. The last 2 days I've gotten 10 to 15 a day.
I've kept my WordPress install up to date though and I don't appear to be compromised. I wonder if that was part of the attack.