All of the packages are tracked in a GitHub project, and are hosted in a Yum repository at pkg.tag1consulting.com. I recommend installing the repository and hiphop and giving it all a try. Follow the instructions provided in the README on GitHub to get started.
Any and all feedback is welcome, and anyone interested in contributing to the Yum repository project is more than welcome to. We are updating these packages and the repository often.
This project is sponsored by examiner.com.
Gerhard has also written a follow-up article on how HipHop performs with Drupal.