Snort 2.4.0 has been released. Here are the release notes. The obvious change in this release is the removal of all rules from the snort-2.4.0.tar.gz tarball. The rules are available separately. Marty assures me that the rule download page will have rules available for non-subscriber and non-registered Snort users by close of business today.
Update: All rules are available -- even those for unregistered users. Nice work Sourcefire.