Linux Support for Newer HP Deskjet Models

BeanDip asks "Does anyone know of any resources for adding better support for newer printers under linux? I own an HP Deskjet 672c and under linux, with the support for the hp up to the 600 I get bad quality color prints 300x300 dpi when under M$ with the HP specific drivers I get good quality prints." I get a lot of questions like these about getting Y printer to work under Linux, so what can you do to get a new printer...any new printer to work with it?