I'm a volunteer firefighter, and our dispatch center already sends us texts, as well as the typical page out over radio. That system proves incredibly useful for us. There is no way for us to text back through the system though, and the number is not a 911 number, it's a normal SMS short code number. Of course, going the other way is a different situation entirely, but my point is, I think that this shows that it is inevitable that texting is going to soon become a part of normal 911 operations.