Drupal 7.x

Hello world! I have a few questions on the current stability of Drupal 7 and integrating existing content, and I'd also like to know how soon some things I've been planning to do will be doable.

Hello everybody,
I need to know some informations about a scission of concept: "User data"(in DBdrupal) from "data"(in DBexternal)
So, use Drupal for manage roles and create and delete users AND use another software (for example PHPrunner, but if u have better i listen!) for manage data
I need to create a system for manage a simple dbms (using mysql) that manipulate data of a lot of table according to the roles/privileges of the user that want do an action (for example Insert a product...). I remember that these roles/privileges are inserted in drupal profile user.

I am trying to migrate my tattoo forum from typical forum style to Drupal. Unsure if my existing blog will migrate or not. Thanks in advance.

Can anybody tell me if Drupal and Joomla can share the same database or if there is a bridge between the two? Thank you in advance. I have a website at http://www.supplytattoo.com that I am trying to change the forum over to a blog type system. I am unclear on the best course of action. I am familiar with both Drupal and Joomla. I have a blog started on Joomla but want to share database.

My website is trying to tap into the college football economy. One section of my site would involve users "scouting" Their team. Essentially have a textbox for them to write about whatever team to their hearts content and post it. I was thinking about getting a blogging module for this, but I haven't found one that does quite what I want it to do. Anyone else think of a creative solution? Thanks in advance.

Hi,
Having a problem installing Drupal 7.

I'm a fairly seasoned PHP/MySQL user, new to Drupal, have read the install pages. Using Drupal 7 because I have PHP 5.3 on my system and kind of need to keep it there for other work I'm doing.

My environment:
MacOS 10.5.8
Apache 2.2.14 (stock from MacOS)
PHP 5.3.0-3 w/GD (from http://www.entropy.ch/software/macosx/php/)
MySQL 5.1.40 (from http://www.mysql.com/downloads/mysql/)
I activated PDO in PHP according to instructions and verified it's working (PDO section appears in phpinfo() )

This environment has been up and running, I have been building PHP/MySQL sites by hand with no problem.

When I run the Drupal 7 installer using the web front-end (http://localhost/drupal), I make it through the Installation Type page (Standard) and Language page (English). Then I am presented with the database config page. I enter the database name ("drupal"), database username and password (root/blank in my case) and click "Save and Continue".

At this point, the same page appears with the message at the bottom "Check the error messages and try again."

I have looked everywhere and cannot find any error messages. Nothing in apache2 error log, nothing in syslog, etc.