I'm home! I got home on the last flight out of Sydney last night. Relieved that it's all over and done with.
A summary:
Got to the Consulate just before 7.30am, waited for about 10 minutes and then they'll let us up. There were about 10 of us who went up in one batch and then surely but surely more and more people kept coming through even before the security guards arrived. In the end, I was third in line for security checks and first as an "IV" applicant and got to sit in the "special row"

. At just after 8am they let us "IV" applicants up the elevator (there were 4 of us) and as luck would have it, I got into the elevator first so I got out last meaning I was last in line when we went in to Level 59.
The first couple (they were K1 too) had the wrong visa processing fee so the fiancee had to go to the post office to get the right one. That held up the proceedings quite a bit. The other guy in line was an American citizen that just needed a visa so he was in and out. Then up went the second guy (he was a young guy and he probably wasn't a K1). Then me! I got up there just after 9am, gave the lovely lady all my paperwork, she told me to sit down (and admire the view from L59) while she looked over my stuff. I pointed out the I-134s for Zach and his parents aren't there but all the supporting evidence were (plus I put unsigned copies of the I-134s so she could see exactly what she'll be eventually getting). About 20 minutes later she was all done and told me to wait for the interviewer. She even wished me "Good Luck!". She was lovely and really put me at ease.
Then 10 minutes later, I got called up to the next window and the Consulate guy and I just started having a "casual chat". He asked the mandatory "So, you're engaged?" and then it went on from there. He made a comment that I will love Missouri (they had a massive poster of the Gateway Arch by the computers so that was a good omen for me). Chat, chat, chat and then a couple of minutes later he told me I was approved PENDING I get the signed I-134s in. I told him it is definitely on its way (and when I got home last night, one set of it was waiting on my bed!). I left my passport with them (he offered to give it back but I knew I had to just give it back anyway so I thought they might aswell keep it) and then we said our pleasantries goodbye and I got out of there!
So there you have it! Conditionally approved! Yay! Now we can start planning our Missouri wedding, look at one way flights and go from there - I just realised there's sooooooooooooooo much to do between now and when I eventually leave. Tomorrow I put in my resignation at work and now seriously preparing for the big move. Any pointers?
At the end of the day, I didn't need to freak out and I did calm down as soon as I got there and waiting (as impatient it got at times) really helped me out. And I truly believe that without you guys and the abundant knowledge out here on VJ, I would have been more nervous - because after reading reviews and getting your comments and advice, it really helped to know how the day was going to go so there was no "surprises". So everybody, THANK YOU!
P.S. As I took the shuttle to the airport from my hotel, I had a lovely couple from LA who also stayed at the Radisson with me. And get this, when we started conversing and I told them I was moving to Missouri and just had my Consulate appointment today, the guy is actually an IMMIGRATION AGENT/LAWYER - so he helps out people like me/us! Talk about small world, hey?