October 13, 2009 — The new Publicize feature on WordPress.com helps you ping out your blog updates to Twitter and Yahoo and bring your followers back to your blog.
This short tutorial will show you how it works and how to get it set up.
September 26, 2009 — Chris Pirillo talks about the origins of Internet communities, what it means to be part of an Internet community, and what’s important in creating and maintaining your Internet community.
Video production by Joe Christensen of Blaze Streaming Media.
September 13, 2009 — HookPress allows you to set up webhooks so that a specified URL (a public service or something you set up) is requested when certain WordPress actions occur. Possible uses include generating push notifications or using non-PHP web technology to extend WordPress. This introduction by the plugin author, mitcho, gives you a brief overview of HookPress and a couple of examples for getting started.
July 24, 2009 — In this short video for self-hosted WordPress blogs, we walk you through the process of adding Twitter updates to the sidebar of your widget-enabled theme, using the Wickett Twitter plugin
July 22, 2009 — This video walks you through a quick way to add your latest Twitter tweets to the sidebar of your blog, via the built in Twitter Widget. For self-hosted blogs, check out this video
May 12, 2009 — Twitter Friendly Links is a plugin for WordPress that provides you with your very own URL shortening service within your own domain name. Get Twitter Friendly Links at the WordPress plugin directory or at the official plugin page
Video by Konstantin Kovshenin
January 23, 2009 — In this final part of his three part series on designing for WordPress, Chris Coyier of CSS-Tricks.com walks you through putting the finishing touches to your WordPress theme, including adding dynamic social media content, such as Twitter updates, to your theme. You can find additional content links and downloadable video at the original CSS-Tricks post