I noticed Sankofa mentioned me in one of her posts and I just thought to reply. Yes, we have an interview date set in March (few more weeks to go!!) and we started the K1 process in November '06. Initially, we were given June '07, but it was changed to March '07.
The entire process for us has been very smooth so far. When we first decided to start the K-1 visa process, I was going to hire a lawyer. I went for a consultation with a lawyer and she gave me a lot of adivce to sucessfully complete the process. She actually encouraged me to file the papers on my own and not to hire her unless I run into any problems with the Ghana embassy or US gov. So that's what I did and so far so good.
Advice given to me:
1. Keep copies of EVERYTHING.
2. Do not send NVC any originals (photo, cards, etc)
3. Organized your package to the NVC well (provide a cover page)
4. Write sworn Affidavit letters (both you and your fiance should write one)
5. It is OK to hand print documents (I129/G325)
6. MOST IMPORTANT: Contact your Senator's office. They are there to help us. All of my communication to the Ghana Embassy has been through the Senator's office (MA residents: Emily Winterson). Don't wait until you are in a predicament before you contact them. Fax a letter to their office with your case number(s) and they will contact the Ghana Embassy.