I thought you had a dedicated server. If it's shared, don't run autoblogs on it, unless they are super tame ones. Definitely don't try to run the monsters that BlueHatSEO talks about.
Dude, I am with the same company, resellerzoom.com and my sites where down yesterday for about 7 hours. They said nothing was wrong, but there was. Now seeing you were hit as well, that just proves it. Let me know if you find out anything.