Conzilla 2.2.2 is a feature and bugfix release.
The major improvements since version 2.2.1 are:
Conzilla 2.2.2 requires a Java Runtime Environment in version 1.5 or newer and can be installed via the download page. If you already have an installation of an earlier version of Conzilla it should be sufficient to launch Conzilla via the shortcuts. Java Web Start will then take care of the upgrade.
If you have comments or suggestions you can send them directly to the Conzilla mailing lists.