Here’s a plugin for WP that allows you to display posts in different languages based on visitor preference.
Krzysztof Kowalczyk argument for including a tightly integrated Wiki with WordPress.
This Plugin for WordPress caches your pages to increase speed and use less resources. Basically, it writes a copy of the page to a file and as long as the page doesn’t change no additional queries are made to the database. Found via Matt.
There’s a comprehensive article in PCWorld.com on RSS readers.
If you would like to experiment with a new admin UI for WP and are adventurous follow along with Chris J. Davis as he goes on a quest to reinvent the admin area.