AKA the “oauthcalypse“…
Twitter now requires all third-party app developers to use “OAuth” for user authentication. Twitter’s reflects a big trend on the social web, where basic authentication is being left behind for the more secure OAuth when services and applications connect user’s accounts
The biggest advantage of OAuth is you don’t have to tell your Twitter password to anyone other than Twitter. Connections will be token-based—once established, you can change your Twitter password without having to re-enter it into the website plugin (or app).
The only disadvantage is that old apps that haven’t updated to use OAuth will stop working this week. All of the popular ones (Seesmic, Tweetdeck, etc.) have already updated.
What does this mean for WordPress users? if you use Twitter Tools (or any other plugin that connects to Twitter) you will have to take extra steps to keep those tools working.
Twitter Tools is a plugin that creates a complete integration between your WordPress blog and your Twitter account. See: WordPress › Twitter Tools « WordPress Plugins.
Twitter Tools offers a useful step by step instruction for how to set up your own “app”. It’s pretty easy but takes a few clicks and I’m sure many users will not be happy this week.