I don't see why there wouldn't be, it's cheaper to manufacture with seemingly no downsides. They probably won't revise the 4GB and 8GB versions until their stocks of the original stepping are used up though, and once they do introduce revised versions it may be a lottery which version you get for a while.
I'll bet they just slipstream them in. There was a huge backlog of the 8GB, that now looks pretty much cleared out. So it could be awhile before the D0 show up.
