Just to add a tangentially related comment:

In terms of keeping pace with current versions of AFNI, we tend to have rolling updates with minor fixes, additions, and new programs; please see here for more description:
[afni.nimh.nih.gov]
The NIH cluster checks for updates daily; that might be faster apace than you want, but probably oftener is betterer.

In terms of staying abreast of specific new features and updates, we would strongly recommend AFNI users to subscribe to the Digest, which is sent out at a rate of approx. once every 1-2 weeks. We point out new features, large changes to existing programs, papers of interest, etc. Sign up is described here:
[afni.nimh.nih.gov]

--pt