At the moment alff is developed as a 'one man show'...
If you like the idea of alff and want to contribute your ideas, new features, fixes (maybe there are some bugs somewhere?), ... just raise your hand on the alff main mailinglist.
The development of alff is coordinated via git - the new source code management tool from Linus Torvalds himself.
The public readable repository is located at http://git.rfc2324.org/repositories/alff.git/
and can be copied on your local maschine via
git clone http://git.rfc2324.org/alff.git/
(Beware that the Debian git-core package is missing a dependency to the curl package, which has to be installed when fetching git repositories via http)