Sigma's second camera to accumulate "near mythic" status in as many years, the compact DP1, is up for pre-order on Amazon. It uses the same Foveon X3 sensor as their SD14 DSLR, which means that at higher ISO settings, shots might be noisier than a Ministry concert. And for $800, you could actually buy an entry-level DSLR. [Amazon via 1001 Noisy Cameras via Gadget Lab]
I used to use a Sigma SD-10, which has the previous gen Foveon sensor. It definitely had advantages in terms of resolution to file size and the color was pretty good. However, anything over 100 was too noisy to be usable. I understand that the current generation of X3 sensor has improved this, but I went back to Leica after I sold my SD10 outfit, so I don't know firsthand.
There aren't that many pocket digicams out there that cater to the enthusiast. I think this camera is a good concept, but I have to question the lens choice. To me, 28mm equiv is a bit on the wide side for a pocket camera. If they could have made it with a 35/2.8 or 35/2.0 equiv, then I think it'd a more useful in more situations. As it's configured now, you'd have to be pretty much in the face of your subject if you wanted to make a portrait. At that distance, who knows with this lens how much distortion there'd be.