Collection of WordPress statistics: http://en.wordpress.com/stats/
WordPress TV visual resources for all things WordPress: http://wordpress.tv/
Video press – Upload and share videos on WordPress – converts your video into multiple formats: http://videopress.com/?ref=wpcom
WordPress beginners guide: http://www.wpbeginner.com/category/beginners-guide/
How to create a slide show in WordPress: http://wordpress.tv/2010/04/14/using-slideshows-on-wordpress-com/