I was listening to NPR yesterday and the reporter kept referring to it as "X, now rebranded Twitter." What else can you do? If you just say "X" nobody knows what the devil you're talking about. It's like "the artist formally known as Prince." Forever awkward.

I'd rather call it something else (I'm enjoying Xitter, pronounced Shitter), but for the purpose of ease of use I transcribe it as X/Twitter so as to hopefully confuse people as little as possible.