Much valuable information is available on the TASI site.
Suitable resolutions for digital master files for various media types are discussed in the HEDS Matrix, and the JIDI Feasibility Study contains a useful table of baseline standards of minimum values of resolutions according to original material type.
A detailed discussion of resolution, binary and bit depth can be found on TASI's Web pages and a good basic guide to colour capture can also be found on the EPIcentre Web pages.