Structure of a site, I need help

I need help to choose how it's best to reproduce in Drupal the model I've
already planned. I hope it's possible:

- I have an hompage where I'll display the various stories that I "promote"
there. Plus announces or infos that are strictly related to the site in
general and to the homepage only. So, more or less, the homepage is like a
"showcase".

- Then I have four different subsites that define four blog-like journals.
With undependent content.

- To each of the story I post in one of the journals I'd like to attack a
term (or more than one). But I also need these terms to be general, where I
need to. So that I could use the same term even on one of the other journal.

This is the structure I need. The point is not only about creating it in
Drupal, but also to use then the structure in a certain way.

- I'd like to define the look of each journal by using appropriate, adjusted
CSS.
- I need a navigation system that will show the various terms and open then
a page that will show all the stories under a term, even when they come from
different journals

How can (if I can) I do all that in Drupal?

Abalieno

-- 
[ Drupal support list | http://list.drupal.org/ ]