Sean Reid has published Part 1 of his Sigma DP2 review at Reid Reviews (note that Reid Reviews is a pay site). Sean begins by making the case that the DP2 parallels the Rollei 35 series of 1966 ff.—a camera for people who weren't interested in smaller format size but wanted one that was pocketable (in contrast to, among other things, the then-current Olympus Pen). He makes a persuasive case for the parallel, and has some other interesting observations about format. The DP1 is also reviewed at Reid Reviews.
Featured Comment by Gordon Lewis: "The Nikon 35Ti (circa 1993) was roughly the same size and weight but offered auto-focus and auto-exposure. I used one for a few weeks. It was more fun in theory than in practice. Using a pocket camera is like using a pocket computer (such as a cell phone with keyboard): You give up a lot of control and flexibility in exchange for convenience. They all suck to some extent, so the question is which one you think sucks the least."