It is to be published by MIT press - according to a recent blog post by her.
It looks as though it may have something to do with YouTube videos - if a recent paper by her is anything to go by.
Limor appears to be something of an an expert in jokes and humor.
Here is her home page.
Update 2013-05-12: Amazon page for the book: Memes: In Digital Culture
Update 2014-09-13: A review / promotional page about the book.