Ken Van Dine has packaged up Matt Mossholder’s gvoice-notifier in a PPA. I’ve added the PPA to the list of messaging menu applications. If you want to help package these up and get them rocking then feel free to grab one! We’re always looking for great applications!
(If you just thought, “Oh neat, if I could SMS from the me menu like you can with the chrome extension…” then congrats on the great idea, here’s the bug!)