As I've mentioned, CS4 Camera RAW 5.2 gives you some additional Camera "Profiles" in the Calibration tab. Still in beta, Adobe has the DNG Profles Editor which lets you take a DNG file, presumably converted from a native RAW file format, and make very specific adjustments to how it is rendered.

Here are three black & white images derived from a single Adobe RGB color file. Each monochrome shot was created using a different b/w conversion method.

Baryta papers, harkening back to some of the glorious silver papers of the darkroom days, have very recently joined the inkjet printing arsenal. It’s big news.