Last Name, First Name (Twitterhandle). “Text of the tweet.” 1 May 2011, 3:58 p.m. Tweet.Where the date and time there is the date and local time the researcher accessed the Tweet.
Of course, this brings with it some other questions--like how a person would follow the citation trail. Twitter is far from easy to search. Not that I'm assuming many people are going to need to follow that trail for a Tweet, but isn't that sort of the point of a citation?
Also, teaching students when it's proper to cite a Tweet might also be a tad tricky. For the vast majority of papers, I can't imagine situations where Tweets are going to be relevant information, but I can picture students' eyes lighting up when they start thinking one of their ten required sources might be all of one sentence long.
Still, nice to see MLA doing its best to stay current and relevant.
What are your thoughts?