.htaccess File Links

Voltar's Newbie .htaccess Tutorial -- Introduction to .htaccess files and regular expressions.
.htaccess Tutorial -- Useful introduction from freewebmasterhelp.com.
URL Rewriting -- A tutorial on how to make your URLs change from dynamic ones to static-looking ones.
Apache 2.0 URL Rewriting Guide -- Documentation on how to rewrite URLs with Apache 2.0. For documentation to other versions of the Apache server, see the Apache Server web site. (I believe this documentation is similar, if not the same, for the different versions of Apache.)
Apache mod_rewrite documentation -- Detailed information on mod_rewrite and URL rewriting for Apache 2.0.