DejaVuWiki has been upgraded to MediaWiki 1.4.8.
Edits are allowed again.
I also tried to upgrade it to 1.5rc3, but unfortunately even if MediaWiki
1.5 is able to run on MySQL 3.x (which is what SF.net uses) it is not able
to upgrade itself on it (which I had the "privilege" to experience and had
to restore the database from backup).
Have a nice day.