I’ve run into multiple sites related to WordPress. Some of the more interesting I’ve encountered recently are:
WP Candy – an active site with WordPress developers and users chiming in. It has news, opinion, tutorials, reviews, a forum and much more.
WP Questions – ask for short-term expert help with your WordPress questions
On Smashing Apps (free and unusual online resources for designers and developers), two posts: 21 Mindblowing Free Themes and 13 Plugins to speed up your Blog.