I phoned RRS a couple of days ago, they said that it should take a month to get a L plate out and that I can probably make a preorder in two to three weeks. I can't shoot tripod vertically without one, I've had one for my 10D and 1Ds (the 1Ds one is for sale, anyone want it?)
Having ACR for the 5D is more than a must, I'm hoping that with the demand for this camera that seems apparent that Adobe will pull out all stops. I suppose I can use DPP if I really have to but shooting RAW+JPG may be the answer until it's ready. I'm also worried that Rawshooter won't support it until the next ($) version. I really like the slideshow selection ability.
For me the grip is a must, I can't hold the thing otherwise with my big hands.
I'm looking to buy it mid November so hopefully by then...