Ah sure! Some protos may need changes, and some functions may need tweaking, of course. But all this will need to be made manually and thus will take a long time.. I think we can start by describing the general behaviour of the extension on the reference.xml page and then, as time permits, touch the function pages.
It's not just the unicode extension that needs to be documented. There are plenty of changes affecting the whole language.
-Andrei
