The other big advantage of using Joomla to build your website is that there are lot of open source components that you can plug in to your site to give it just about any functionality that you want. For example:

• Newsletter
• Auto Generated Site Map
• Search Engine Friendly Urls, that is, "my-cool-page.htm" instead of "option/3/5/component"
• Embedded blog (Wordpress)
• Comments - Allow readers to add comments to your articles
• Events Calendar
• RSS Syndication - generate an RSS feed for your site.
• RSS import - read RSS feeds into your site
• Form Builder: create forms that users fill out; the forms then get stored in a database
• Hierarchical DHTML menus