Based on the latest information from today, we will probably have only one product announcement this Wednesday (November 30th) - the new Nikon SB-910 speedlight unit. This is how the new flash unit was described to me:
"The SB-910 differs from SB-900 in refined ergonomics (also 1% lighter, 1% smaller), redesigned menus, improved overheating control and ... that's it. No "bulb mode" or anything similar. And yes, it's supposed to be introduced on October 26th, but was delayed."
This explains why Nikon did not schedule any press events for November 30th - this is not a major product announcement. The rest of the expected products will probably be revealed in 2012. If there will be a surprise this Wednesday, it will be a lens (or two) but not the Nikon D800. I will have a live coverage starting tomorrow - for US readers the announcement will happen around midnight EST tomorrow (Tuesday).
Just to remind you that I still expect the D800 to have 36MP and not 18MP like several websites have suggested in the past few days. I am still standing behind the rumors form early October and as you will see in the next few days they will slowly start to come true.