Yaakov,
you are right, we are working intensively on the next version.
However, it will not be a micro or minor release.
Au contraire, it will be quite a jump.
Large parts of the codebase have been rewritten in the recent weeks to
allow for better testing, extendability and maintainability. Also the
UI will be completely revamped. The next listo version does not use
Java Swing anymore but rather Qt Jambi from Trolltech. This makes the
UI much more sleek and simplifies a lot of things (e.g.
internationalization, which was rather sketchy so far).
So, the changes you requested (collapsable folders, folder names with
spaces) will be there, don't worry.
However, due to the number of changes it is difficult to release a
minor upgrade.
Unfortunately you will have to wait for the full migration to have
taken place.
However, we are happy with the progress we are making there...
Cheers,
Mathias
PS: By the way, we also changed our version control system from SVN to
git. This is why you won't see any more updates to the google code
codebase. With the next release the new codebase will likely move to
github for everyone to tap into.