umw is a bash script that enables you to easily update your
svn-installed mediawikis to the latest revision or to a specific
revision.
You can find it at
http://karastathis.org/index.php/Umw
It available under a free licence and I hope you will find it useful,
but it has no warranty so you use it at your own risk.
--
Thanks,
NSK Nikolaos S. Karastathis,
http://karastathis.org/