September 20, 2009 — Will Norris talks about some of the common pitfalls and mistakes made when constructing plugins, including security and usability concerns and how to efficiently and cleanly create your code. Includes code examples of both what to do and what not to do.

Video production by Joe Christensen of Blaze Streaming Media.

September 20, 2009 — John Hawkins demonstrates the basics of constructing a plugin, designing it to make the changes you want, and then using that plugin to alter your WordPress site in a persistent way. Includes some basic discussion on hooks and functions, as well as some sample code.

Video production by Joe Christensen of Blaze Streaming Media.

September 19, 2009 — Duane Storey of BraveNewCode talks to WordCamp Portland about opportunities for WordPress and mobile devices, including the history of the mobile internet, the opportunities presented by mobile web users, plugins and themes available to facilitate mobile use of WordPress, how to test your site for mobile use, and more.

Video production by Joe Christensen of Blaze Streaming Media.

September 19, 2009 — Matt Mullenweg of Automattic answers questions from the WordPress community, including making money from open source products, migrating from WordPress.com to WordPress.org, the history of WordPress, the roles system in WordPress, core vs. plugins, blog comments, WordPress security, and more.

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.

September 12, 2009 — John Hawkins runs through the basics of creating a WordPress plugin, with code examples and an explanation of the basic principles behind plugin creation and interactions.

July 11, 2009 — Jeremy Clarke presents on why your site might be going slow and show you how to squeeze more out of your cheap hosting (and avoid upgrading to expensive dedicated servers!), including a look at caching plugins to help you in case of a traffic spike and tuning plugins to help you identify expensive features that need work.

Slides for this presentation are available here.

Video production by Arthur Cormon of TV McGill.

July 11, 2009 — Andy Peatling of Automattic talks about the WP social networking system BuddyPress at WordCamp Montreal and gives practical advice for people considering it as a platform.

Video production by Arthur Cormon of TV McGill.

July 11, 2009 — A question and answer session from WordCamp Montreal with Matt Mullenweg. Questions were submitted by WordCamp attendees and also asked during the session, and cover such topics as tags on WordPress.com, the WordPress upgrade system, multilingual support in WordPress, and more.

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