In this post from the Utah PHP Users Group Site today, they talk about their meeting just past (January 2006) and what was presented.

For January's presentation, Richard K. Miller presented on model-view-controller (MVC) frameworks. MVC framework Ruby on Rails has received a lot of attention in the past year for making web app development easier and more enjoyable. Several similar frameworks are available for PHP. Special guest John Peterson of MyTechSupport.com, the creators of a PHP framework called PHP on Trax also presented. PHP on Trax was used to rapidly develop KatrinaHousing.org, a highly trafficked website that helped hurricane victims find housing.

In the comments of the post, there's also a link to both presentations of the night - MVC frameworks for PHP and PHP on Trax...