Recent updates to the OED
The OED is updated four times a year, every March, June, September, and December.
The material added to the dictionary includes revised versions of existing entries (which replace the older versions), and new words and senses both within the alphabetical sequence of revised entries and also across the whole A to Z range.
Published quarterly since 2000, the updates make up the Third Edition of the OED.
The latest update: June 2012
In the June 2012 update we revise some 2,500 SUB- and SUPER- words, including subculture, subvert, supercool, superhero, and supernatural. Super- has been a particularly productive prefix in American political language in 2012: new additions include topical words like super PAC, supermajority, and superdelegate.
You can read more about the revisions and new words in the June update in this article by the Chief Editor of the OED, John Simpson.
See a full list of the new words, new subentries, and new senses of existing words added in this update.