A few weeks ago, the 13th major release of WordPress saw the light of day after more than six months of work by 218 contributors. WordPress 3.0 (codenamed Thelonious after the famous jazz pianist Thelonious Monk) introduces some very exciting new features, including the much awaited merging of WordPress MU (Multi-User) and WordPress.
Among the 1,217 bug fixes and feature enhancements, WordPress 3.0 also has a new default theme called Twenty Ten. Theme developers also get a new API to implement custom headers, backgrounds, menus and so on. So now, you don't need to hack the code as much to customize the themes.
In this article, I highlight 5 of the most important and interesting features introduced in WordPress 3.0.

1. WordPress + WordPress MU Integration

This is probably the most talked about feature in WordPress 3.0. The WordPress team has finally wrapped the functionality of WordPress Multi-User into the main WordPress project. If you're wondering what this means, then this feature probably isn't something you need and you shouldn't worry about it. For the more curious and unaware, this integration allows you to manage multiple blogs with different permissions from a single admin panel.

2. New Theme: 2010

Say goodbye to the old default Kubrick theme and say hello to Twenty Ten! This new theme introduced with WordPress 3.0 has a similar page structure as Kubrick, but a few changes make it much more appealing than its predecessor (see Figure 1 below). To begin with, the theme is wider; the accepted minimum resolution of screens is 1024x768 as opposed to 800x600.

New WordPress 3.0 Theme: Twenty Ten
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Figure 1. New WordPress 3.0 Theme: Twenty Ten
The blue header has been replaced with an image. Ah, a picture speaks a thousand words! Or in this case, it almost brings the page to life. What is even better is that you can easily set different header images for different pages.

3. Custom Menus

Don't you wish that you could put together certain categories of posts and certain pages under the same menu in the site navigation? Wouldn't it be great to have more control of the site navigation than simply organizing the site into Categories, Pages and Blog rolls as independent sections? Gets kinda boring, doesn't it? Luckily, this type of control is delivered through custom menus, one of the best additions in WordPress 3.0 (see Figure 2).

New WordPress 3.0 Custom Menus
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Figure 2. New WordPress 3.0 Custom Menus
Under the Appearance box in the admin panel, you will find a new link called Menus. On that page, you can simply drag and drop custom links, pages or categories of posts into a menu and position them in any order you want. Depending on the theme you use, it might support one or more menus. If you are building your own theme, you should research how to incorporate custom menus into your theme.

4. Custom Taxonomy

What are taxonomies? Well, taxonomies are different methods for classifying things. In the case of WordPress, you are classifying your posts. Prior to WordPress 2.3, this could be done only with Categories.
Suppose you have a large variety of posts that you publish on your website. You would have a sizable category tree, which would become quite unmanageable. To overcome this inflexibility, WordPress introduced custom tags. While categories are usually thought out in advance for specific types of content on the site, tags provide a more impromptu method of classifying your content. Using the important keywords in the post as tags will make it easier for the reader to search through your website.
Over time, users requested that the WordPress team allow them to create fully hierarchical custom taxonomies. Finally in WordPress 3.0, their wish has been fulfilled. With just a few lines of code, you can add custom taxonomies to your blog.

5. Custom Post Types

According to the WordPress Codex, "Post type refers to the various structured data that is maintained in the WordPress posts table. Custom post types allow users to easily create and manage such things as portfolios, projects, video libraries, podcasts, quotes, chats, and whatever a user or developer can imagine."
In other words, as a developer, you are no longer restricted to the structure of a blog post for your entries. You can have a variety of post types. For example, suppose you build a website to sell seashells on the Internet. You want to enter the size, color and texture of the shells, but you also want to have a blog section to rant about how your shells are different from the seashells that Sheila sells on the seashore. With custom blog types, you can easily create blog posts as well as entries for your seashell catalog.


In my opinion, these five features are the most important in WordPress 3.0. There are a few other minor updates worth looking into, like the new color scheme of the dashboard, an improved API for theme developers and the ability to upload a featured image for each blog post. WordPress 3.0 has definitely taken a huge step towards becoming more usable for non-programmers while giving the advanced programmer the ability to tweak WordPress to suit his wants.
In my upcoming articles, I will look into each of these features more in detail and explain how you can actually implement them on your website.