Thom Hogan posted his Nikon roadmap and some general thoughts over camera development. It should interest you because there is a big part where he discusses the new market segment opened by Panasonic and Olympus.
One more thing. Like you I read all this post over Fullframe sensors and their advantage. I never partecipate this discussions because it is mostly a waste of time. Fullframe doesn’t make a better photographer from you and the image quality you gain is not worthy for the high price you have to pay for it. It depends from your needs which camera or system you have to choose.
Thom Hogan says it right:”The FX Lust. I’m going to go out on a limb here and say that most people lusting after FX are using excuses to justify wanting it, not showing real need. Can you really say that you’re hitting diffraction, ISO, isolation, or viewfinder brightness limits with DX? Right, most of you can’t. Most of you would be better served by the D300′s cover-the-frame AF, frankly. DX has advantages, too–cost being a huge one–so don’t overlook them.“
and: “The Pursuit of Pixels. See my previous comments on this site: 12mp is probably more than good enough for most people. A few complain “but I tend to crop a lot.” Not a valid excuse, as this is usually a lens or photographer problem, not a camera issue: keep reading.“
Please folks, try to understand your needs and then shop consequently. Do not waste money and time. What matters are the stories you want to tell and not the camera you use!