Johnny Hughes sent the official CentOS 4.4 announcement this morning. Major changes are listed as:
Mozilla has been replaced by Seamonkey, Ethereal has been replaced by Wireshark. Firefox and Thunderbird have moved from the 1.0.x to 1.5.x versions. Openoffice.org has moved from the 1.1.2-x to the 1.1.5-x version.Release notes can be found here. Downloads can be found here.