Uniforum is the Registrar for all .co.za domain names. They offer a pretty efficient service and have some strict policies regarding the domains in this namespace. Theres a very useful set of Frequently Asked Questions available for public browsing.
World Wide Web Consortium http://www.w3.org/
The World Wide Web Consortium The World Wide Web Consortium (W3C) is an international consortium where Member organizations, a full-time staff, and the public work together to develop Web standards. Their mission is to lead the World Wide Web to its full potential by developing protocols and guidelines that ensure long-term growth for the Web.
The SamSpade Website is named after a detective played by Humphrey Bogart in "The Maltese Falcon". The website offers some useful facilities for Domain lookups and such things.
A Beginner's Guide to HTML http://archive.ncsa.uiuc.edu/General/Internet/WWW/HTMLPrimerAll.php
Thus website offers a very useful guide to beginners in HTML. It gives really nice coverage of all the basic technical stuff.