More tires manufacturers are toying with the idea of the 650B format. Both Schwalbe and CST have unofficially announced a possibility. If you do not know, CST is the Cheng Shin Tire company, who is the parent company of MAXXIS. If CST offers a 650B/584 tire you can bet MAXXIS will offer something too. I spoke to Continental Tires at NAHBS, they are interested in the idea, but as of right now, they are running at capacity with their 26" and 29" MTB tires and can't keep up with demand on those. They would have to reduce production on something thats selling, to add something new to their arsenal, and wouldn't be happening soon. I'll keep my ear to the ground about these tid-bits and keep everyone posted as I know something!