Let's start with Sony - patent application 20090303371 is for a new Sony CMOS sensor based on the Foveon approach - each pixel capture RG&B:
"Accordingly, in order to utilize the incident light amount efficiently as well as to prevent occurrence of false colors, a method of separating colors by forming plural photodiodes in a pixel in the depth direction of a substrate has been developed."
Sony is definitely pushing hard in sensor design - as a reference they have ~50 applications in "solid state imaging device" so far this year.
There is a new Panasonic patent application, which has a detailed drawings of a new camera that looks like a Four Thirds DSLR. Brief summary of the main features:
"Live-View, Optical Viewfinder, mirror and prism, of course interchangeable FourThirds lens mount, CMOS sensor, supersonic vibration generator, No Video recording, No in body stabilization."
More patent details:
A reminder that patent application are not aways an indication of future products.