This MKII update issue is really bothering me. Really. As I appear to be leaning more and more to sports photography, I would certainly appreciate the 8.5 fps. In addition, as I prefer shallow DOF, I would certainly value 45-point AF - with shallow DOF the marginal for mistake is after all rather low. In addition, the crop factor is rather convenient for my purposes.
All in all, what I would probaply prefer, would be a "baby mark II" body, a 1.6 crop body with 45 AF-points, some 8 fps and other features like 1-series. Yes. Considering the everlasting rumors about 3D, that would just be the body for me, if the high ISO-noise would be comparable to 20D. I would certainly be willing to pay 5D money for such camera.
However, now I am just wondering. I would certainly not prefer FF for less fps. Never. Hope that Canon keeps the high fps vs. high resolution bodies still separate. For the moment, I will not be getting the Mark IIn, while this situation of uncertainity lasts. Just hope that Canon makes some delibarate moves in this class of cameras.