I should go to the joomla wish list forum for questions like this.

found this:

http://www.joomlaxt.com/news/staticxt/staticxt_2.03.00_available.html

into Joomla, is there component or module that will crawl my pages and add them?

I see that it is a planned feature http://dev.joomla.org/content/view/23/61/

Is there a way to set up joomla so it is loaded on my dedicated server and spans across all my domains?

Looks like the Community Builder will do it for me. http://www.joomlapolis.com

Where do I go to learn how to edit the regisration form? I need to add age verification to the registration process so it adds the age to the user and database. Also want it to refuse entry if the age is not 18 or over.