I wrote to my publisher yesterday. Apparently e-books take another four to six weeks to produce after the print publication date. Who knew?! (Ahh.. the things you learn as a new author.)
She also told me that "once created, [it] will be available on Amazon, Barnes and Noble, [Focal Press's] website, and a number of other, smaller resellers’ sites. We aim to be 'platform agnostic', so it should be available for pretty much any device someone wants to use!"
So those of you interested in an e-version keep an eye out for it some time in July!