Sorry.. This feature still wasn't included.. Our doc team fault.. It's planned to add in future.
currently you should use calendar disabled attribute and change it via ajax request.
Hmm... I think it is not very good idea to change component state via ajax. Too many requests make application too slow.
Also, would you please post the link to the wiki for voting on future features?
Somewhere the ajax action components not optionally configured in richfaces-demo in order not to make the code too complex and just show the basic attributes and usage ways. Optimization attributes described in our guide and Ajax Attributes demo section.
It is really simple to make Ajax calls with your library. What's why I like it and use in my applications. But often I have to make Ajax calls for very simple things. For example, I have a table and toolbar with buttons "Add", "Edit", "Delete". Accessibility of this buttons depends on user rights, data in current row and so on. I have to update full toolbar on every change of current row.
So, I have to do too many Ajax calls. And if there are many active users of application then it is very hard to server.