The Twitter universe encompasses some odd creatures, including all manner of "Incredible Hulk" spinoffs typing their primitive tweets in all caps. One that language lovers should follow is the delightful Grammar Hulk. Copy editor Andy Bechtel has posted a Q&A with Grammar Hulk — read it here.

Filmmakers Will Hoffman and Daniel Mercadante have put together a short video that's a real treat for visual/verbal types, using striking images to play with the ambiguities of words. The video was made to accompany the latest episode of the WNYC show Radiolab, entitled "Words." Watch the video here and listen to the Radiolab episode here.

Still mulling over Sarah Palin's use of the word refudiate? Check out these two commentaries. In his Good magazine column, Visual Thesaurus contributor Mark Peters uses Refudiate-gate as an opportunity for a "Sarah Palin retrospective" here. And Geoff Nunberg argues on NPR's "Fresh Air" that the reactions to Palin's gaffe were more telling than the gaffe itself, here.

The monumental Dictionary of American Regional English is finally nearing completion after 45 years. In Newsweek DARE editor Joan Houston Hall writes that despite reports of American English becoming homogeneous, "DARE's research shows that American English is as varied as ever." Read Hall's column here.

Robert Lane Greene, a journalist for The Economist who contributes to the magazine's excellent language blog Johnson, has contributed a fascinating column on the Macmillan Dictionary blog about American English. Greene uses his own personal linguistic biography to question the whole idea of a monolithic "American English." Read the column here.

The blogosphere has been abuzz over Sarah Palin's use of the word refudiate in a Twitter update, apparently mashing up refute and repudiate. Now OUPblog, the official blog of Oxford University Press, weighs in. "Refudiate this, word snobs!" chortles OUP lexicographer Christine Lindberg. Read all about it here.

The Los Angeles Times takes a fascinating look at how electronic reading has the potential to revolutionize the concept of the book. "Books are increasingly able to talk to readers, quiz them on their grasp of the material, play videos to illustrate a point or connect them with a community of fellow readers." Read the article here.