
Try it, and give us feedback about your experience.
Write some documentation. Without documentation, a project is useless.
Recommend Caudium to some people you know. You don't really have to tell them to try it now or they will die, just tell him about it. If other people tell them the same thing, chances are that they will install it. When these people install Caudium, they will look for documentation.
Mention Caudium in newsgroups/web sites telling them what you think of it.
Translate documentation.
If you do this, you will help promote Caudium's success. Remember, one of Caudium disadvantages is that the community is too small right now.
The next paragraph is for people who want to get involved a little more, but don't have lot of time, and/or are not technically minded.