From the latest Surface blog post.
Not much info to be had other than "wait and you will eventually get one". If you still want it, that is. I personally still do!
I bet Redmond is wishing the Surface was a well positioned product already and guaranteed sufficient sales. Throttling the supply is necessary in the face of unstable demand (although I think the person doing their estimating needs to be shot), but it's a balancing act. Too many on the shelves, and it looks bad. Not enough stock and it looks bad. They're under the microscope, and that's not a comfortable place to be.