I will keep the topic updated with when I feel this is going to take place.
Right now I am leaning towards tomorrow as the target date due to a few factors.
1 - My stupidity.
Software engineers know NEVER to introduce major (or minor) changes the day before a code release, but I found a way to improve the responsiveness of the code by a small amount (every little bit helps!) so I did some last minute modifications and had to retest everything. I am still in the process of finishing tests (4:30am I went to bed...). Everything looks good, but I did have one bug which drove me nuts last night.
2 - Outside issues
A few problems on the board came up and I took the time to try to deal with them. This took up a LOT of time that was scheduled for working on the code.
There will be several things which will NOT make it in initially and can be expected in the coming days AFTER the upgrade. Some items I just wont have time to finish testing, others wont be complete. We'll simply push forward and add them as needed. Most of them should NOT require down time.