Can anyone tell me the scripting/code that can allow the end user of my website to create thier own subdomain automaticaly on the website?

If not, does anyone know of an expert chat room where I might find someone who can answer the above question.

Thanks in anticipation of your help.

I think this all depends on how much control you have over your website.

As far as I know, the easiest way is to use wildcard domains. With this system all subdomains (that haven't been separately defined) will redirect to your main site. If you are doing this you can then place an .htaccess file in your main directory and use mod_rewrite:
http://httpd.apache.org/docs/mod/mod_rewrite.html
to redirect them to the correct directories on your site.
(take a look at http://www.free-webhosting.info which uses this method of redirection).

You can then use PHP or Perl to write new subdomains to this file.

Might not be the best way (or even work!) but its as much as I know

The webserver is my own/dedicated so I will have complete control over it.