No, you didn't step through a timewarp into the future! As part of the unification between Narayana (http://www.jboss.org/narayana) and BlackTie we upgraded the BlackTie major version number to be consistent with Narayana, hence we skipped version 4.

You can download the latest milestone release from: http://www.jboss.org/blacktie/downloads/5_0_0_M1

The documentation for the release is now available online (or in the distribution) at: http://www.jboss.org/blacktie/documentation/5_0_0_M1

The release notes are linked from the BlackTie homepage: http://www.jboss.org/blacktie/

Hope you like what we created!