Stumble! for WordPress adds random article functionality to WordPress, behaving in a similar way to MediaWiki’s random article feature and StumbleUpon’s StumbleThru (hence, “Stumble!”).

The plugin also integrates with YARPP to allow stumbling amongst similar articles. You may have seen the green “Liked this Article?” button on some other blogs:

The Green Stumble Button

The plugin is easy to use. To stumble on your blog (providing the plugin is installed), simply link to http://<your-blog-address>/?stumble; for example:

There's loads more!
Why not read a <a href="http://infinity-infinity.com/?stumble">random article</a>?

You can also stumble amongst related articles (powered by YARPP) using ?stumble=<post-id>, such as:

<a href="http://infinity-infinity.com/?stumble=24">Read a related article</a>

By default and further configuration, Stumble! for WordPress gives priority to posts which have the most comments, so your best content is stumbled first. This ultimately leads to readers seeing your most interesting content, and therefore spending more time on your blog.

The Stumble! for WordPress network allows related blogs (or your own blogs, if you choose) to “mash” their articles so readers can stumble across other blogs. Over 400 blogs have joined the global network.