We've never accused Sigma of lacking innovation, and while the Japanese manufacturer is best known for making lenses, Sigma also markets a line of cameras.
The latest - the DP2 Quattro - features an all-new ~19.6 million pixel APC-C Foveon sensor and a completely new body design. You can read more about the sensor here and the new body design is... interesting. The DP2 Quattro certainly feels very different to its decidedly 'traditional' forebears thanks to a greatly elongated body and unconventional angled grip.
Read more about the Sigma dp2 Quattro