I found this, you can compare for yourself:
Sigma SD1 / SD1 Merrill In-depth Review: Digital Photography Review
Thanks everyone, it certainly looks very interesting. We should be getting them in stock soon so if we can get a demo unit out i will be able to have a play.
the inconsistent colors and some other quirks sometimes drive me crazy
I really like your flickeflu shots. I see only a couple at high ISO. Yes, grainy at 3200, but work in B&W as if a pushed Tri-X from the film days. do you expect the Merrill versions to perform much better? Will you upgrade?