I've had the pleasure of being a guest writer at a fantastic site called phpmaster.com.  This site is a subsidiary site to one of the most popular technology blogging sites sitepoint.com.

The first article I wrote is an excellent extension of the various CakePHP articles I've written about in the past.  It discusses a variety of ways to improve the speed of CakePHP applications.  The latest article (that was just released a few days ago) discusses creating your very own OAuth server.  Since OAuth2 is still in a draft state, the article is for creating an OAuth1 server.

In case you are not a regular of this site, here is a quick preview of the articles.