[support] hierarchical site, taxonomy, styling, and structure

Hi there, I'm presently considering using drupal (4.7) for a new project. The idea is to have a hierarchy of sub-sites, all managed by a single drupal installation, with a well-designed taxonomy. Is it possible to let drupal serve sub-site-specific styles, as well as blocks (menus) ? I expect sub-sites to be maintained by different groupes of people, and so I want to let them design their own website layout / styling, with a minimum of constraints to still be able to cross-link and navigate across the whole site. I'd appreciate any pointers. Thanks, Stefan -- ...ich hab' noch einen Koffer in Berlin...