Questions about I600A

Hello Adoption.com community. My wife and I are adopting a little boy from Korea and our adoption process has been anything but normal (in a good way). Here is a small run down of what we have done so far: 10/24/11 - Adoption Process Started 11/26/11 - Homestudy Done 12/12/11 - Surprise Referral 12/19/11 - Referral Acceptance 1/6/12 - Official Documents Signed / Big Checks Written :D 1/31/12 - Notification of I600A Fingerprinting 2/21/12 - Official Korean paperwork "releasing" our son 2/22/12 - Fingerprinting Done Weird how quickly everything has gone right? We are very blessed but more about this later. :) When we received notification from the US Gov. about our I600A on 1/31/12, it says that they are processing our I600A and all they needed was fingerprints. We were told from the officials at the US Gov. office that it would take days for the USCIS to get our fingerprints, all done electronically. I know that we should get notification of the I600A approval but from there, we don't really know what happens. I've read around the net a lot this week and different people get different processes. Once our I600A is approved, I assume that paperwork goes to the American-Korean consulate for approval? Or is it the NVC? And if that's true, then I assume that my son will get his Visa hopefully within a week or two and we will get a travel call shortly after that. We are guesstimating that we will travel in mid-April now but we hope that it is way sooner than that. What do you guys think? As we are getting closer to travel time, we are anxiously trying to get a better understanding on the Visa process and how long it will take. Our SW has done a tremendous job at filing 99% of our paperwork for us, so it's been a painless process. We will definitely be adopting another Korean child in another couple of years with this agency. Last but not least, God has really blessed us with our little guy. Everyone we know was absolutely shocked at how quickly we got word of him; we weren't expecting to have a referral until the end of this summer and travel in 2013! Thanks in advance for the advice/answers.