Deprecated - Drupal core

I currently have only one domain and have to run 4 sites with shared user base.
Later on (5 months period) I will have 4 domains - a single one for each of my sites.

I plan on first running single domain / drupal instalation and distinct the sites by a path, e.g.:
mydomain.com/site1
mydomain.com/site2
mydomain.com/site3
mydomain.com/site4

I want to either have distinct db for each site or to use the table prefix. Only the user table will be shared by all sites.
1) Is this possible anyway?

Since I spend most days doing Joomla I became interested in the Drupal controlpanel module. I thought to offer Drupal as an alternative to Joomla. But as someone mentioned there is a problem with it being connected to the menu. Remove the menu and the CP is dead. I have not seen anyway of getting around this. I just saw this idea

http://www.hivemindz.com/screenshots/drupalsplit.gif

has anyone considered adding optional rules based access filtering to the core?

The idea being it supercedes the current permissions rules, but does not replace them.
ie: an optional core module that woudl allow those needing additional rules specified to enable them.

I am currently playing w/ some code i wrote as a proof of concept for this.

I won't spend a lot of time arguing the pros and cons of this. those who understand rules-based filtering understand its headaches as well as its benefits.. but here is the following examples:

Table: access_rules

Apologies in advance for what will be a big post, I'm just thrilled to see great minds thinking alike.

This post was originally written in the "Issues" section, but got so big I felt I should drag it out here. So many of my comments refer to the body of this big thread. I hope the right folk will still be able to find it...

First - I too identified this need (for a way to relate nodes to each other meaningfully) , and wrote up a really big proposal on how to address it, using only existing web standards.

In cases that some folk don't stop to think about too much, metadata is actually a reference to another resource.
The familiar a href="http://www.w3.org/TR/rdf-primer/" is of course one of these cases.
But there is an implicit relationship in the definition of an href - that is it's a link.
Interestingly, this can be explicitly stated with the attribute syntax rel="link" but nobody ever bothers. This make it what the infomation-theorists refer to as a 'triple' : {this-text}{links-to}{that-page} ... but 'links-to' isn't all we can do...

And the next day set about implimenting it, and so far have achieved what I set out to do:

Ok... I read somewhere at some point in time that Drupal 4.7 would allow me to add new block sections(instead of just sidebar_right and left)... so I could make the header a block section if I wanted?

And, If so can I make specific Block Code(like in a module)that I can send out with my themes to display things in those certain blocks?

I am kind of comfused here if you cant tell...

I dont know if this is the right section to post this in, But I felt that it was a core question...

What is this?

21952 k FILE

Can I delete it? It just appeared, don't know how?