My visa application is finally sent off to Chicago. Here is how it worked for me:
The people at Sunlin requested the information to prove financial capability (on my part) and anything that the visa issuance people in Korea asked for. When that cleared, I had a visa confirmation/approval/pre-approval number. It seems to be referred to by several names. So, with that number, I called the visa office in Chicago and confirmed that I had all I needed (the website in the prior post lists what you need to send: $45 money order, a postage paid, addressed envelope for them to send back your visa, your passport and the filled out form you can download from the site). Sunlin provided guarantor information, as well. Then it was just mailing it off, certified mail. Now I’m waiting to get it back.
My suggestion for anyone planning to take this path, is allow for a month on the Korean side and a month on the American side. It may very well go quicker than that, but if it doesn’t, you’re in trouble. And, of course, order your Passport 2-3 months before that, because you have to have a passport to get a visa.