If you're using the totally awesome Zotero for your citations and cite-while-you-write, you can now create bibliographies in the Oxford MLA way thanks to this style sheet I whipped up.

First, make sure you're in firefox and you've installed Zotero.

http://www.zotero.org/

Then click on the link below.

http://protondonor.no-ip.org/zotero_styles/MLA_Oxford2008.csl

Restart firefox.
Done.

Now when you select items from your library and select "make bibliography" one of the styles available is Modern Language Association (Oxford), which features the correct modifications to MLA 4.0 which oxford demands.

It's easy to edit the styles and make your own - any text editor can do it.