Apache modules mpm-itk and mod_ruid2 can also run virtual hosts as their users.
SuPHP uses much more CPU and memory resources than mpm-itk or mod_ruid2.
This add-on for Parallels Plesk Panel allows to run PHP scripts as domain FTP user. It works in conjunction with mpm-itk or mod_ruid2 modules. In this case standard PHP module runs scripts. This is the fastest method unlike suPHP and FastCGI commonly used for the same purpose.
Cost: $9 per server.
Authors: Eduard Haritonov, Andy Martinovsky