MediaWiki: namespace and customizable messages

Brion wrote:
>Most of the user interface messages can now be 
>modified directly by editing a special page in the 
>'MediaWiki:' namespace. Since this can be somewhat 
>dangerous these pages are protected and editing is 
>restricted to sysops.

Worried sysop here. I want to change 'Bug reports' to 'Contact us' on the 
English Wikipedia but since it has hundreds of thousands of pages I'm worried 
that doing so would really screw something up (like the page cache) or at 
least slow the whole wiki down to nothing for several minutes while it did 
its update thingy. 

>So far this feature does not completely replace the 
>LanguageXx.php files, 

I would like to change meta's 'meta namespace' from 'Wikipedia' to 
'Meta.Wikimedia' but I already made some changes to meta's interface using 
the MediaWiki namespace. So my question is this; how do I get my hands on 
meta's most up-to-date version of language.php? 

>but it should make it a lot easier to get most things 
>adjusted without the delay of contacting the developers 
>to get new versions of language files tested and installed. 
>Additionally, custom messages may be used to insert 
>common reusable bits of text into articles. 

I would like to thank you guys for adding this feature - it is truly awesome 
dude! <- California speak. 

-- Daniel Mayer (aka mav)