A year ago, the Modern Language Association (MLA) announced its preferred format for citing tweets:
Lastname, Firstname (TwitterHandle). "Tweet message in its entirety." Date of tweet. Tweet. (Extrapolated from an example at http://www.mla.org/style/handbook_faq/cite_a_tweet)
Earlier this week, for whatever reason, many academics on Twitter were passing this info along as if it were brand-new. Many were excited that the option to cite a tweet as a tweet exists at all, and it is heartening that the MLA has attempted to keep up, citation-wise, with the far more rapid pace of technological experimentation.