I've started the process of procuring all the ancillary stuff that will be required before I put the D700 into service and thought I would share my thoughts and discoveries.
The first thing that I did was order a Markins plate for the MB10 that I ordered so that I will have something that will allow me to use the Arca system straight away. I'm still undecided as to whether I will get two L brackets for both configurations, but it seems that I will have to.
I have preordered an RRS L bracket for the body from RRS. When I asked them if the D300-MB10 bracket would fit they said that they are going to come out with a custom one for the D700 because the D300-MB10 L bracket makes it too difficult to open the battery door. They said it is possible to use it in a pinch. They are not, as of today, taking preorders for that one.
The great news is that the AC adapter for my old D100 is still compatible with the D700. I could not believe my eyes when I saw it in the compatibility matrix within the product brochure.
More good news. I ordered the BL-3 battery door for the MB10 and found that the EL4's my D2X uses are compatible and so is my charger for both the EL4's and 4a's.
That should do it.
Any other ideas would be a welcome addition to the thread.