The Fourth Edition of the OSPD (Official Scrabble Players Dictionary) has been out for months, but I am a laggard, a slow adaptor, a stick in the mud. I am still using OSPD-3 (gasp!). I just don't know if I can live in a world where "new" Scrabble words such as FE, KI, OI, QI, ZA, VIG, VUM, FEDEX, and JIGGY are allowed. Perhaps it is ZA that most offends my aesthetic — it's dorm slang for "pizza." And FEDEX? How is that a word? Let alone a verb? (Yes, FEDEXED, FEDEXES, and FEDEXING are allowed. It boggles the mind).
But I do like some of the new words. Ones I have wanted to be able to play for years, such as DUH, DEF, FAB, MEDS, BURQA, and ZOOEY. (Try using those in a sentence.)
A list of more of the new words here. Or you could just break down and buy the frigging thing.