I won DV in 2004 while I was in Student VISA, My Case # was 9***. I went to USCIS Virginia and they didnot accept my AOS forms as my case no was not current. I calculated my timing and fpound that my case will be Current by august and AOS was not possible in Two month as you have to go through background check and they dont put me in priority. I wasworried as my friend did not get green card as he decided to do AOS but his # got current in September amd he was denied visa as time was not sufficient. So I changed my intention and wanted to go to nepal. I called up Kentucky center and changed my intention and asked them to send my second letter in MY US address. After I got my letter I went to Kathmandu and got my visa changed. that was eagiest one. So I would suggest if you have time go Nepal and get it done, I am not saying you will not get VISA here but definitely lot of tension. wish you good luck