I would say this is all a pretty solid indication that this will be announced in the next few MINUTES, if not the next hour.
Theres a website, a clickable link to said website from Deaf West themselves, a ticket listing on Ticketmaster and some pretty solid date information (18 weeks ONLY) across the boards here.
Just because if hasn't been announced yet doesn't mean it's not happening. There's some pretty solid evidence here, and a theater negotiation doesn't just happen in the blink of an eye. They don't sign the contract and say "QUICK! GO ANNOUNCE IT ON BROADWAYWORLD.COM!" I'm sure the agreement is long since made and finalized and they are just ironing out all details before an announcement.
Stay tuned...