I just checked with one of the local T-Mobile stores, and the gal just got an email that
they would be available in store on April 24! (I'm in KC metro, if that matters)
Sorry for the late response, I did contact a Tmo store here in Centerville. The guy still had no idea when it would be released, he did take my # and offer to call/text as soon as he knows. I'll update further once I hear something there.