and a belated welcome to the forum.
The FOVEON sensor has been out for quite some time now. It's latest incarnations located in the compact DP-1 and the DSL SD-14 from Sigma. It has quite the following - especially amongst portrait photographers, because of it's ability to render skin tones and colors in the red spectrum very well.
The soon-to-hit the market DP-2 and SD-15 do not present an upgrade to the sensor, but rather improved processing and faster reaction times. Perhaps an upgrade to the metering to fix some iffy white-balance issues.
Considering how long this sensor has been in the market, it is unlikely that FOVEON will capture the market from the regular bayer-interpolated sensors.
Other alternatives have cropped up as well. The Fuji S5 Pro's "Super CCD" sensor with it's unique blend og larger and smaller photosites blended in with each other, has also secured a small following among portrait-photographer and again for it's pleasing color-rendition.
However, tests and market-experience have shows that they have their own unique brand of drawbacks to go with their strengths as well.
Nevertheless is it refreshing to see alternate technologies being developed. The bayer-interpolated CMOS sensors are beginning to hit their performance-ceiling.