Version 3.3 has now been released.

The only iso image files now available are for the 3.3 release.

These are located in /centos/3.3/

Disks 1-3 are binary roms for install
Disk 3 also has the addons/extras/updates and docs repositories
Disks 4-6 are source roms

The .torrent file is a seed for a dvd download using bittorrent.