sunrocket does as well. thats what i just signed up for. it had the best reviews plus it also givess you a free cordless phone system with dual phones when you are referred by a friend (incase anyone wants to sign up, the promo code is 6177620169).

but anyhow, i think most of them are adding the 911 feature now. plus, you can always call and give your location, it's called like e911 or something.