Wow that was quick eh? As for me, I'll be sending my Affidavit of support today. I also just received my I.V. Bill thru email... I'm gonna pay it on Friday. Did you just download the DS-230 from their website?
by the way, from which country are you from? I was just wondering coz it also depends on the embassy abroad how slow or soon they'll be scheduling the medical exam and interview...